Synonyms of ad-lib

2 Syllables
made-up, adlib, invent, bandaid, improv, band-aid
3 Syllables
spontaneous, unbidden, devising, unscripted, inventing, impromptu, devised, storify, hot-and-cold, unprompted, off-the-cuff
4 Syllables
improviso, improvised, unprepared, unrehearsed, impulsive, improvising, spontaneously, extempore, improvise, rough-and-ready, wild-and-woolly
5 Syllables
spur-of-the-moment, unpremediated, improvisate, extemporize, extemporized, extemporaneous, extemporizing, unmeditated, autoschediastic
6 Syllables
extemporization, improvisatory