ex tempore

noun 0.799

impromptu

noun 0.779

improvisation

noun 0.605

spur of the moment

noun 0.595

declamation

noun 0.568

improvising

noun 0.566

improv

noun 0.551

speechmaking

noun 0.538

oratory

noun 0.532

improvisational theatre

noun 0.521

expatiating

noun 0.521

expounding

noun 0.516

improvisational comedy

noun 0.515

speech

noun 0.513

speechifying

noun 0.508

soliloquy

noun 0.506

exhortative

noun 0.506

freestyling

noun 0.506

viva voce

noun 0.504

free-form

noun 0.504

freestyle

noun 0.502

improviser

noun 0.501