Synonyms of improvisatory

1 Syllable
free, snap, fake
2 Syllables
made-up, jamming, casual, improv, offhand, ad-lib
3 Syllables
on-the-spot, spontaneous, unstudied, expedient, makeshift, impromptu, unplanned, informal, off-the-cuff
4 Syllables
improviso, unprepared, unrehearsed, immediate, automatic, extempore
5 Syllables
spur-of-the-moment, extemporaneous, autoschediastic, extemporary
6 Syllables
unpremeditated