| Main Entry: | |
| Part of Speech: | adverb |
| Definition: | at the same time |
| Synonyms: | all at once, altogether, as a body, as a group, as a whole, as one, at once, en masse, in concert |
| Main Entry: | suddenly |
| Part of Speech: | adverb |
| Definition: | unexpectedly |
| Synonyms: | aback, abruptly, all at once, all of a sudden, asudden, forthwith, on spur of moment, quickly, short, sudden, swiftly, unanticipatedly, unaware, unawares, without warning |
| Antonyms: | expectedly, slowly |
| Main Entry: | then |
| Part of Speech: | adverb |
| Definition: | before; at another time |
| Synonyms: | again, all at once, anon, at that instant, at that moment, at that point, at that time, before long, formerly, later, next, on that occasion, soon after, suddenly, thereupon, when, years ago |
| Notes: | than is ultimately the same word as then, and the two were used interchangeably until the end of the 17th century |
| Main Entry: | en masse |
| Part of Speech: | adverb |
| Definition: | all together |
| Synonyms: | all at once, as a body, as a group, as a whole, as one, collectively, communally, cooperatively, en bloc, ensemble, in a group, in chorus, in unison, jointly, together, unanimously, unitedly, wholly, with one voice |
| Main Entry: | concurrently |
| Part of Speech: | adverb |
| Definition: | together |
| Synonyms: | all at once, all together, contemporaneously, jointly, simultaneously, synchronously, unitedly |
| Main Entry: | synchronously |
| Part of Speech: | adverb |
| Definition: | together |
| Synonyms: | all at once, all together, as one, at one fell swoop, closely, coincidentally, collectively, combined, commonly, concertedly, concomitantly, concurrently, conjointly, contemporaneously, en masse, hand in glove, hand in hand, in a body, in concert, in cooperation, in one breath, in sync, in unison, jointly, mutually, on the beat, side by side, simultaneously, synchronically, unanimously, unitedly, with one accord, with one voice, with the beat |