at once
WordReference English Thesaurus © 2025
Sense: Immediately
Synonyms:
now Collocations, quickly Collocations, this moment, PDQ, all at once, amain, apace, directly Collocations, expeditiously, forthwith, hastily Collocations, helter-skelter, hurriedly, hurry-scurry, in a hurry, in no time, instanter, instantly, on the instant, on the spot, pell-mell, per saltum, pretty damn quick, promptly Collocations, pronto, right away, right now, right off, slapdash, smartly, speedily, straightaway Collocations, subito, summarily, swiftly Collocations, then and there, this minute, this very minute, with a rush, with all haste, with all speed, with dispatch, with haste, without delay, without further delay, in nothing flat
Sense: Simultaneously
Synonyms:
all at once, at the same time, concurrently, together Collocations, all together, as one, at a blow, at a stroke, at one blow, at one jump, at one stroke, at one swoop, at one time, conjointly, in concord, in partnership, in unison, jointly