Synonyms and Antonyms of ad hoc
made or done without previous thought or preparation upon learning that it was her birthday, we had an ad hoc celebration right there in the restaurant Synonyms extemporaneous, 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, unstudiedRelated Words unscripted; automatic, impulsive, instinctive, involuntary, spontaneous; casual, cursive, informal, unauthorized; half-baked, half-cocked, ill-advisedNear Antonyms deliberate, intended, intentionalAntonyms considered, planned, premeditated, premeditative, prepared, rehearsed
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