2 Syllables: SU
Abel, able, ablest, anal, angel, April, baleful, baneful, basal, cable, changeful, cradle, cranial, fable, facial, faithful, fatal, fateful, gable, gainful, glacial, graceful, grateful, hateful, hazel, label, ladle, Mabel, maple, Naples, nasal, natal, naval, navel, painful, papal, playful, Rachel, racial, radial, Raphael, sable, shameful, spatial, stable, staple, table, tasteful, wakeful, wasteful
2 Syllables: US
3 Syllables: USU
appraisal, Archangel, disable, disdainful, disgraceful, distasteful, enable, palatial, prenatal, unable, unfaithful, ungrateful, unstable
Found 65 words across 3 groupings. Skipped 17 excess words of a similar stem.