Main entry: now, directly, immediately, instantly, forthwith, like a shot, straight off, straightaway, at once, right away
Definition: without delay or hesitation; with no time intervening
Usage: he answered immediately; found an answer straightaway; an official accused of dishonesty should be suspended forthwith; Come here now!
Main entry: right away, promptly
Definition: at once (usually modifies an undesirable occurrence)
Usage: he promptly forgot the address