Synonyms and related words :
ad lib, ad libitum, ad-lib, ad-libbing, arrangement, at short notice, at sight, by ear, cadenza, caught napping, caught off balance, caught short, extemporaneous, extemporaneously, extemporaneousness, extemporarily, extemporariness, extemporary, extempore, extemporization, extemporized, flourish, haphazard, hasty, hot lick, improvisation, improvisatorial, improvise, improvised, improvision, improviso, interpolation, jury-rig, jury-rigged, lick, makeshift, measure, off the cuff, off the hip, off-the-cuff, offhand, on sight, out of hand, playing by ear, precipitate, pro tempore, quick, riff, rough-and-ready, snap, stopgap, surprised, taken aback, taken by surprise, taken unawares, temporary arrangement, temporary measure, tripped up, unarranged, unbegun, unconcocted, uncontrived, undeliberated, undevised, unhatched, unmade, unmanufactured, unorganized, unplanned, unpremeditated, unprepared, unprimed, unready, unrehearsed, unstudied, vamp