Synonyms of extempore

2 Syllables
adlib, casual, bandaid, improv, band-aid, ad-lib
3 Syllables
spontaneous, unbidden, unscripted, adlibbed, ad-libbing, impromptu, informal, unfussy, throwaway, off-the-cuff
4 Syllables
improviso, improvised, low-pressure, free-and-easy
5 Syllables
spur-of-the-moment, unpremediated, extemporaneous, autoschediastic, extemporary
6 Syllables
unpremeditated, improvisatory