extempore Synonyms

extemporarily off-the-cuff unrehearsed offhand extemporaneously offhanded impromptu extemporary extemporaneous without preparation unprepared by ear improvisational free-and-easy stopgap made-up without consideration off your own bat according to pleasure unpremeditated off the top of head without rehearsal unscripted unprompted unplanned on the spot on the fly make shift improv on impulse ad lib improviso improvised improvisatory improvisatorial extemporized ad libitum extemporal casual cadenza impulsively informal instinctive ad hoc spontaneously unstudied unbidden spontaneous snap makeshift