extempore, expository, unrehearsed, cadenced, oratorical, conversational, ad lib, sermonic, improvisational, declamatory, rote, improvisatory, verbose, longwinded, eloquent, unilluminating, idiomatic, impromptu, essayistic, pithy, rhetorical, unaccented, succinct, extemporized, songlike, gettysburg address, jocular, teacherly, aphoristic, stilted, humorous, lawyerly, winded, wordy, calisthenic, kyrie eleison, fugal, interpretive dance, discursive, parliamentary procedure, shakespearean sonnet, witty, lyrical, unrhymed, singsongy, impassioned, contrapuntal, metrical, reiterative, poetical, toneless, freestyle, erudite, infelicitous, precalculus, pianistic, loquacious, phonic, denotative, abstruse, ex tempore, polytonal, prefatory, performative, homiletic, prepositional, disjunctive, nonliteral, quippy, subjunctive, strophic, dialogic, spelling bee, intelligible, interrogative, expressional, artful, grammatical, unscripted, sesquipedalian, polysyllabic, unquotable, mirthful, pointillistic, ineloquent, inarticulate, lucid, decipherable, esoteric, stump speech, euphonious, elaborative, digressive, beethovenian, nonverbal, folksy, cryptic, bombastic, unintelligible, incisive, songful, haiku, extemporary, epideictic, pulpit, panegyrical, unpremeditated, epigrammatic, gnomic, sententious, fluent

impromptu

ad-lib, off-the-cuff, offhand, offhanded, unprepared