Or search: aa, ally, link, mate, peer, unite, assort, escort, player, adjunct, connect, consort, partner, compeer, pardner
2 Syllables: SU
boasted, bolted, coated, copious, floated, folded, glorious, Grotius, laureate, loaded, molded, noted, odious, opiate, poet, Proteus, roasted, Roebuck, scolded, Soviet, voted
3 Syllables: SUU
holiness
3 Syllables: USU
appropriate, associate, censorious, commodious, denoted, devoted, eroded, erroneous, exploded, harmonious, inglorious, laborious, melodious, notorious, opprobrious, outmoded, Potomac, promoted, revolted, Theodosius, unfolded, unloaded, victorious
4 Syllables: USUU
appropriates, dissociate, negotiate
4 Syllables: UUSU
acrimonious, ceremonious, meritorious, parsimonious

Found 52 words across 5 groupings. Skipped 2 excess words of a similar stem.