Oas rhymes with:
tcas, abs, acquiesce, aggress, assess, bess, besse, bless, bress, bresse, caress, ccs, ches, chess, coalesce, confess, convalesce, cress, depress, digress, dispossess, distress, dress, dss, egress, ellesse, es, ess, esse, etess, express, express', fess, finesse, fluoresce, forbess, gess, gless, gress, guess, hces, hess, hesse, impress, jess, kess, kless, kness, kress, kresse, l'express, largesse, lcs, les, less, ls, lutece, lyness, mess, nes, ness, nevertheless, noblesse, nonetheless, obsess, oppress, pesce, pless, possess, press, press', presse, profess, reassess, recess, redress, repossess, repress, ress, s, s., siese, simplesse, stress, success, suppress, tcas, tess, transgress, tress, ts, undress, unless, uss, vess, wes, wess, ws, yes
Oas sounds like:
o'hashi, o'kicki, o's, o'shea, o.'s, o.s, o.s', oak, oak's, oakes, oakey, oaks, oaks', oaky, oases, oasis, oaxaca, ocasio, ocaw, ocaw's, occhoa, occhoa's, och, ochoa, ochs, oesch, og, ogawa, ogg, oh's, ohashi, ohio's, ohs, oishi, oj, oja, oji, ok, oka, okasaki, okay, okays, okaz, okazaki, okey, oki, okie, okwu, oohs, ooohs, ooze, oozes, os, osage, osages, osaka, osake, osaki, osakowa, osakowa's, osco, ose, osh, osha, osha's, oshawa, oshea, oshkosh, osiecki, osika, osowski, oss, ossa, osso, osuch, oswego, ouaga, ouch, owes, owosso, ox, oxoco, oxy, oz, ozaki, ozawa, ozga, ozick, ozick's, ozzie