extemporaneous Synonyms

extemporary impromptu offhanded extempore offhand unrehearsed off-the-cuff unprepared off-hand voluntary ex tempore extemporaneously ad lib unpremeditated instinctive unplanned rough and ready unarranged not rehearsed thrown off shot from the hip dashed off according to pleasure as one thinks best as one wishes unthought unscripted unprompted unhatched undevised unstudied unorganized improvisatorial impetuous hasty haphazard extemporized ad libitum extemporal concoctive casual candid autoschediastic improvisatory improvised unmeant unbidden unbegun spontaneous snap