Or search: nonbeliever
3 Syllables: SUU
bishopric, chrysalis, disparate, distances, hypocrite, Limerick, syphilis, ticklish
4 Syllables: USUU
archbishopric, episcopate, existences, invigorate, religionists, resistances
5 Syllables: UUSUU
illegitimate, inconsiderate, reminiscences

Found 17 words across 3 groupings. Skipped 2 excess words of a similar stem.