Synonyms of made-up

2 Syllables
untrue, unreal, mythic, specious, false, ad-lib
3 Syllables
fictional, prepared, trumped-up, notional, mythical, adlibbed, ad-libbing, assumed, chimeral, invented, fictive, dreamed-up, chimeric, folkloric, off-the-cuff
4 Syllables
make-believe, unconforming, mythologic, fabricated, unnatural, pseudonymous
5 Syllables
spur-of-the-moment, extemporaneous, mythological, imaginary
6 Syllables
improvisatory