Synonyms and Antonyms of extemporaneous
made or done without previous thought or preparation <caught by surprise, I had to make an extemporaneous speech at the awards banquet> Synonyms ad hoc, ad-lib, down and dirty, extemporary, extempore, impromptu, improvisational, improvised, offhand, offhanded, off-the-cuff, snap, spur-of-the-moment, unconsidered, unplanned, unpremeditated, unprepared, unrehearsed, unstudied Related Words unscripted; automatic, impulsive, instinctive, involuntary, spontaneous; casual, cursive, informal, unauthorized; half-baked, half-cocked, ill-advised Near Antonyms deliberate, intended, intentional Antonyms considered, planned, premeditated, premeditative, prepared, rehearsed
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