Or search: permeable
3 Syllables: SUU
amiable, bearable, cerebral, clerical, enviable, germinal, malleable, parable, permeable, pitiable, terrible, variable
3 Syllables: UUS
agreeable, foreseeable
4 Syllables: USUU
chimerical, invariable, numerical, referable, unbearable, unenviable
4 Syllables: UUUS
disagreeable
5 Syllables: UUSUU
imperturbable, irremediable

Found 23 words across 5 groupings. Skipped 2 excess words of a similar stem.