| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | unexpected; happening quickly |
| Synonyms: | abrupt, accelerated, acute, expeditious, fast, flash, fleet, hasty, headlong, hurried, immediate, impetuous, impromptu, impulsive, out of the blue, precipitant, precipitate, precipitous, quick, quickened, rapid, rash, rushing, spasmodic, speeded, subito, swift, unforeseen, unusual |
| Antonyms: | expected, slow |
| Main Entry: | unrehearsed |
| Part of Speech: | adjective |
| Definition: | spontaneous |
| Synonyms: | ad-lib, extemporaneous, from the hip, impromptu, improvised, impulsive, not rehearsed, off the cuff, off the top of one's head, spur of the moment, unpracticed, unprepared |
| Main Entry: | pickup |
| Part of Speech: | noun |
| Definition: | boost |
| Synonyms: | acceleration, impromptu, stimulant |
| Main Entry: | extempore |
| Part of Speech: | adjective |
| Definition: | offhand |
| Synonyms: | extemporaneous, impromptu |
| Notes: | impromptu conveys unrehearsed remarks or performance with an element of surprise, while extempore only suggests that this is done without notes or props |
| Main Entry: | ad libitum |
| Part of Speech: | adjective, adverb |
| Definition: | at one's pleasure |
| Synonyms: | according to pleasure, ad-lib, as one thinks best, as one wishes, at will, extemporaneous, freely, impromptu, improvised, impulsive, made-up, off-the-cuff, offhand, spontaneously, unrehearsed, without restraint |
| Main Entry: | extemporaneous |
| Part of Speech: | adjective |
| Definition: | improvised |
| Synonyms: | ad hoc, ad-lib, automatic, autoschediastic, by ear, casual, expedient, extemporary, extempore, fake, free, immediate, impromptu, improv, improvisatory, improviso, informal, jamming, made-up, makeshift, offhand, on impulse, on-the-spot, snap, spontaneous, spur-of-the-moment, toss off, toss out, unplanned, unpremeditated, unprepared, unrehearsed, unstudied, winging it |
| Notes: | extemporaneous means 'prepared in advance and carried out with few or no notes' while impromptu means 'totally unprepared, performed on the spur of the moment' - but this distinction has been all but lost |
| Antonyms: | deliberate, planned, premeditated, prepared, rehearsed |
| Main Entry: | off the cuff |
| Part of Speech: | adjective, adverb |
| Definition: | without preparation |
| Synonyms: | ad-lib, by ear, extemporaneously, impromptu, improv, improvised, makeshift, off the hip, off the top of one's head, offhand, spur of the moment, unrehearsed |
| Main Entry: | spontaneously |
| Part of Speech: | adverb |
| Definition: | instinctively |
| Synonyms: | ad-lib, automatically, extemporaneously, immediately, impromptu, impulsively, unconsciously |
| Main Entry: | unplanned |
| Part of Speech: | adjective |
| Definition: | not planned |
| Synonyms: | accidental, adventitious, aleatory, fortuitous, haphazard, impromptu, random, spontaneous, undesigned, unexpected, unintended, unintentional |
| Antonyms: | planned |