The word simultaneously means happening or done at the exact same time. Imagine patting your head with your right hand while rubbing your stomach with your left hand. When you do both actions at once, you are doing them simultaneously.
We use synonyms for simultaneously when talking about sports, music, school events, or even everyday chores. Learning new ways to say simultaneously and synonyms for simultaneously helps learners make their writing expressive.
This guide gives you 30 simple synonyms for simultaneously. Along with easy sentences, word origins, pronunciation guides, and clear categories. .
Meaning of Simultaneously
Definition
Simultaneously (Adverb): At the exact same time.
Examples
- The two runners crossed the finish line simultaneously.
- She sang and played the piano simultaneously.
Connotative Meaning
- Positive tone: Shows impressive speed, great teamwork, or smooth coordination.
- Negative tone: Can mean feeling chaotic, rushed, or overwhelmed by doing too much at once.
- Neutral tone: Simply states that two or more events are happening at the same time.
Etymology
- Source language: Came from Latin roots long ago.
- Latin Root: Simul (means together or at the same time).
- Modern English: Used to describe things happening together in one single moment!
Pronunciation
- US: /ˌsaɪmlˈteɪniəsli/
- UK: /ˌsɪmlˈteɪniəsli/
Syllables
si-mul-ta-ne-ous-ly (5 parts)
Affixation Pattern of Simultaneously
- Root: Simul (means together)
- Suffix: -ous (makes an adjective) + -ly (makes an adverb)
- Word Formation:
- Noun: Simultaneity
- Adjective: Simultaneous
- Adverb: Simultaneously
Also read more about https://synonymhunting.com/synonyms-for-slowly/
Synonyms for Simultaneously
1. At the same time (Adverb Phrase) — US: /æt ðə seɪm taɪm/ | UK: /æt ðə seɪm taɪm/
Meaning: Happening together in one single moment.
Examples:
Both children shouted the answer at the same time.
Lightning flashed and thunder roared at the same time.
2. Together (Adverb) — US: /təˈɡɛðər/ | UK: /təˈɡeðə/
Meaning: Doing things alongside each other at one time.
Examples:
They jumped into the swimming pool together.
We clapped our hands together at the end of the show.
3. All at once (Adverb Phrase) — US: /ɔːl æt wʌns/ | UK: /ɔːl æt wʌns/
Meaning: Everything happening suddenly at the very same moment.
Examples:
The lights came back on all at once.
All at once, the balloons floated into the sky.
4. In unison (Adverb Phrase) — US: /ɪn ˈjuːnɪsn/ | UK: /ɪn ˈjuːnɪsn/
Meaning: Speaking or moving as one single group.
Examples:
The students stood up in unison to greet the teacher.
The birds flew in unison across the blue sky.
5. Concurrently (Adverb) — US: /kənˈkɜːrəntli/ | UK: /kənˈkʌrəntli/
Meaning: Happening during the exact same period of time.
Examples:
The two school games were played concurrently.
She managed two projects concurrently this week.
6. At once (Adverb Phrase) — US: /æt wʌns/ | UK: /æt wʌns/
Meaning: Together right now in the present moment.
Examples:
Do not try to solve all problems at once.
The bell rang and everyone cheered at once.
7. Jointly (Adverb) — US: /ˈdʒɔɪntli/ | UK: /ˈdʒɔɪntli/
Meaning: Done together by two or more people.
Examples:
The two classes presented the play jointly.
They built a giant sandcastle jointly on the beach.
8. Side by side (Adverb Phrase) — US: /saɪd baɪ saɪd/ | UK: /saɪd baɪ saɪd/
Meaning: Moving or happening next to each other at the same time.
Examples:
The cars raced side by side down the track.
We worked side by side to clean the classroom.
9. In parallel (Adverb Phrase) — US: /ɪn ˈpærəlɛl/ | UK: /ɪn ˈpærəlel/
Meaning: Happening side-by-side without interfering with each other.
Examples:
The two events ran in parallel during the festival.
He cooked dinner in parallel with washing the dishes.
10. Simultaneously (In sync) (Adverb) — US: /ɪn sɪŋk/ | UK: /ɪn sɪŋk/
Meaning: Moving together smoothly with perfect timing.
Examples:
The dancers moved in sync with the upbeat music.
Their watches ticked completely in sync.
11. Hand in hand (Adverb Phrase) — US: /hænd ɪn hænd/ | UK: /hænd ɪn hænd/
Meaning: Happening together because they are connected.
Examples:
Hard work and success go hand in hand.
Practice and improvement walk hand in hand.
12. As one (Adverb Phrase) — US: /æz wʌns/ | UK: /æz wʌns/
Meaning: Moving or speaking together like a single person.
Examples:
The audience cheered as one when the goal was scored.
The team moved forward as one unit.
13. Synchronously (Adverb) — US: /ˈsɪŋkrənəsli/ | UK: /ˈsɪŋkrənəsli/
Meaning: Happening at the exact same time and pace.
Examples:
The rowers pulled their oars synchronously.
The clocks chimed synchronously at midnight.
14. In tandem (Adverb Phrase) — US: /ɪn ˈtændəm/ | UK: /ɪn ˈtændəm/
Meaning: Working together side-by-side to finish a task.
Examples:
The two helper dogs worked in tandem to guide the way.
Engineers worked in tandem to fix the track.
15. At one time (Adverb Phrase) — US: /æt wʌn taɪm/ | UK: /æt wʌn taɪm/
Meaning: Together in a single block of time.
Examples:
Only four people can enter the room at one time.
Don’t eat too many snacks at one time.
16. In concert (Adverb Phrase) — US: /ɪn ˈkɑːnsərt/ | UK: /ɪn ˈkɒnsət/
Meaning: Working together in complete harmony.
Examples:
The instruments played in concert during the show.
Teachers and parents worked in concert for the trip.
17. Simultaneously (Together) (Adverb) — US: /təˈɡɛðərli/ | UK: /təˈɡeðəli/
Meaning: Combined together into one single action.
Examples:
The lights flashed together on the tree.
The choir sang together on stage.
18. At the same instant (Adverb Phrase) — US: /æt ðə seɪm ˈɪnstənt/ | UK: /æt ðə seɪm ˈɪnstənt/
Meaning: Happening in the exact same second.
Examples:
Both racers crossed the line at the same instant.
The doors opened at the same instant.
19. Coincidentally (Adverb) — US: /koʊˌɪnsɪˈdɛntli/ | UK: /kəʊˌɪnsɪˈdentli/
Meaning: Happening at the same time by chance or luck.
Examples:
Coincidentally, we both wore red shirts today!
They arrived at the park coincidentally.
20. Contemporaneously (Adverb) — US: /kənˌtɛmpəˈreɪniəsli/ | UK: /kənˌtempəˈreɪniəsli/
Meaning: Existing or happening in the same historical time period.
Examples:
These two famous books were written contemporaneously.
The buildings were constructed contemporaneously.
21. Harmoniously (Adverb) — US: /hɑːrˈmoʊniəsli/ | UK: /hɑːˈməʊniəsli/
Meaning: Working or sounding beautiful together at the same time.
Examples:
The voices blended harmoniously in song.
The instruments played harmoniously together.
22. In lockstep (Adverb Phrase) — US: /ɪn ˈlɑːkstɛp/ | UK: /ɪn ˈlɒkstep/
Meaning: Moving with identical footsteps and timing.
Examples:
The parade marched in lockstep down the street.
Their feet moved in lockstep during the dance.
23. Collectively (Adverb) — US: /kəˈlɛktɪvli/ | UK: /kəˈlektɪvli/
Meaning: Done by all members of a group at once.
Examples:
The team collectively made the big decision.
They collectively raised money for the school library.
24. Coequally (Adverb) — US: /koʊˈiːkwəli/ | UK: /kəʊˈiːkwəli/
Meaning: Happening with equal rank at the same time.
Examples:
Both leaders ruled coequally over the kingdom.
The tasks were shared coequally among students.
25. Simultaneously (At the same moment) (Adverb Phrase) — US: /æt ðə seɪm ˈmoʊmənt/ | UK: /æt ðə seɪm ˈməʊmənt/
Meaning: In one exact moment.
Examples:
They turned around at the same moment.
The phone rang at the same moment someone knocked.
26. In harmony (Adverb Phrase) — US: /ɪn ˈhɑːrməni/ | UK: /ɪn ˈhɑːməni/
Meaning: Matching perfectly together without conflict.
Examples:
The team worked in harmony to build the tower.
The birds sang in harmony in the morning.
27. Simultaneously (All together) (Adverb Phrase) — US: /ɔːl təˈɡɛðər/ | UK: /ɔːl təˈɡeðə/
Meaning: Every single person or item acting at once.
Examples:
All together, shout “Happy Birthday!”
They stood up all together when the principal entered.
28. Co-currently (Adverb) — US: /koʊ ˈkɜːrəntli/ | UK: /kəʊ ˈkʌrəntli/
Meaning: Running side-by-side alongside another event.
Examples:
The test ran co-currently with the lesson.
Both shows broadcast co-currently.
29. Side-by-side (Adverb) — US: /saɪd baɪ saɪd/ | UK: /saɪd baɪ saɪd/
Meaning: Standing or moving right next to one another.
Examples:
They walked side-by-side to the park.
We placed the two boxes side-by-side.
30. Unitarily (Adverb) — US: /ˌjuːnɪˈtɛrəli/ | UK: /ˌjuːnɪˈtərɪli/
Meaning: Acting together as one single unit.
Examples:
The class voted unitarily for the zoo trip.
The group decided unitarily to start early.
Prototype Meaning
When children hear simultaneously, they picture a chorus of voices shouting “Surprise!” together at a birthday party, or clapping hands at the exact same beat.
Prototype Categorization
- Everyday Common Words: At the same time, Together, All at once, At once, All together, Side by side.
- Music & Group Actions: In unison, In sync, As one, Synchronously, Harmoniously, In harmony.
- Work & Teamwork: Concurrently, In parallel, In tandem, In concert, Jointly, Hand in hand, Collectively.
- Exact Time & Matches: At the same instant, At the same moment, Coincidentally, At one time.
- Formal & Advance Terms: Contemporaneously, In lockstep, Coequally, Co-currently, Unitarily.
Antonyms of Simultaneously
- Separately
- One by one
- Alternately
- Later
- Before
- One after another
Short Questions and Answers
- What does simultaneously mean?
- It means two or more things are happening at the exact same time.
- When should I use simultaneously?
- Use it when writing about doing two chores at once, group performances, or double events happening together.
- Is simultaneously an adjective or an adverb?
- It is an adverb because it describes how or when an action happens!
- How is simultaneously different from together?
- Together usually means people doing something as a group, while simultaneously focuses specifically on the exact matching timing of two events
Conclusion
Synonyms for simultaneously can help you describe actions. That happen at the same time in a clearer and more natural way. Words and phrases such as at the same time, together, concurrently, concurrently, and in unison can add variety to your English. Each expression may fit a different situation. Knowing these alternatives helps you choose the right words. For English learners, learning synonyms can improve writing, speaking, reading, and everyday communication. Synonyms for simultaneously also helps avoid repeating the same word in sentences. Try using synonyms for simultaneously in sentences about people, events, or actions happening together. With daily practice, you can build a stronger vocabulary. Express your ideas more clearly, and become more confident in English.
I’m Zahid Abbas, an educator, researcher, and digital publishing strategist with a passion for linguistics, grammar, and clear communication. As a content creator and SEO specialist, I craft research-driven, reader-focused content that empowers learners and makes knowledge accessible worldwide.
