Or search: brackish, inedible, unsavory, offensive, tasteless, uneatable, unsavoury, unpleasant, distasteful, unappetising
3 Syllables: SUU
fashionable
4 Syllables: SUUU
applicable, charitable, creditable, equitable, habitable, irritable, marketable, navigable, palatable, profitable, reputable
5 Syllables: USUUU
attributable, disreputable, imaginable, indomitable, inequitable, inevitable, inimitable, unfashionable, unfathomable
6 Syllables: UUSUUU
ineradicable, uninhabitable

Found 23 words across 4 groupings.