adjective
Synonyms: extemporaneous , autoschediastic, extemporary, extempore, impromptu, improvised, offhand, spur-of-the-moment, unstudied
Antonyms: rehearsed
adjective
Synonyms: extemporaneous , autoschediastic, extemporary, extempore, impromptu, improvised, offhand, spur-of-the-moment, unstudied
Antonyms: rehearsed
Merriam Webster. Collegiate thesaurus English vocabulary. Английский энциклопедический словарь тезаурус. 2003