| offhand(adjective, impromptu, extemporaneous, improv) |
| ad lib(expression, makeshift, spontaneously, improv, extemporaneously) |
| impromptu(offhand, extemporaneous, spontaneously, improv, extemporaneously) |
| ad-lib(offhand, impromptu, extemporaneous, spontaneously, improv) |
| by ear(expression, offhand, impromptu, makeshift, spontaneously) |
| gone off half-cocked(expression, idiom, violent, fast, quick) |
| improv(offhand, impromptu, makeshift, spontaneously, extemporaneously) |
| improvised(offhand, impromptu, extemporaneous, improv) |
| jump the gun(expression, idiom, violent, fast, quick) |
| off the cuff(expression, adjective, idiom, adverb, preparation) |
| off the top of head(expression, idiom, fast, quick, impromptu) |
| out of hand(expression, idiom) |
| spur of the moment(expression, idiom, offhand, impromptu, makeshift) |
| unanticipated(violent, fast, quick, subitaneous) |
| unrehearsed(offhand, impromptu, extemporaneous) |
| without preparation(expression, offhand, impromptu, throwaway, extemporaneous) |
| without warning(expression, violent, fast, quick, subitaneous) |
| abrupt(violent, fast, quick) |
| according to pleasure(expression, idiom, spontaneously, improv, extemporaneously) |
| ad libitum(expression, spontaneously, improv, extemporaneously) |