1 Syllable: S
2 Syllables: SU
boastful, coastal, doleful, focal, global, hopeful, jovial, local, mobile, modal, Mogul, noble, opal, Oriel, oval, postal, social, total, vocal, Vogel, woeful
2 Syllables: US
3 Syllables: USU
armorial, baronial, betrothal, colloquial, corporeal, disposal, ennoble, ignoble, immobile, memorial, parochial, pictorial, proposal, reproachful, unsocial
4 Syllables: UUSU
anecdotal, antisocial, ceremonial, dictatorial, editorial, equatorial, immemorial, matrimonial, sacerdotal, senatorial, territorial, testimonial
5 Syllables: UUUSU
Found 54 words across 6 groupings. Skipped 10 excess words of a similar stem.