At Once
[adv] without delay; with no time intervening; "he answered immediately"; "found an answer straightaway"; "an official accused of dishonesty should be suspended forthwith"; "Come here now!"
[adv] simultaneously; "he took three cookies at a time"
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Synonyms
at a time, at one time, directly, forthwith, immediately, in real time, instantly, now, right away, straight off, straightaway
Related Terms
all at once, all together, amain, apace, as one, at a blow, at a stroke, at one blow, at one jump, at one stroke, at one swoop, at one time, by forced marches, coincidentally, coinstantaneously, concurrently, conjointly, corporately, cursorily, decisively