Or search: arab, nomad, moslem, muslim, arabian
2 Syllables: SU
Catherine, javelin, platinum
3 Syllables: SUU
adamant, adjutant, aspirant, Cameron, garrisoned, garrisons, Jacobin, Madison, masculine, sacrament, stratagem
4 Syllables: USUU
extravagance, extravagant

Found 16 words across 3 groupings. Skipped 3 excess words of a similar stem.