Synonyms and related words :
PDQ, abruptly, apace, aphoristically, at once, briefly, brusquely, compendiously, concisely, crisply, curtly, decisively, directly, economically, expeditiously, forthwith, immediately, in brief compass, in no time, instanter, instantly, laconically, on the instant, on the spot, peremptorily, pithily, pointedly, precipitately, pretty damned quick, promptly, pronto, quickly, right away, right off, sententiously, shortly, smartly, sparely, speedily, straightaway, straightway, subito, succinctly, suddenly, swiftly, synoptically, tersely, with all speed, without delay, without further delay, without hesitation, without warning