Tertia rhymes with:
consortia, harsha, marcia, marsha, porsche, portia, absentia, acacia, aiesha, alicia, alisha, asha, avitia, basha, bhatia, boucher, busha, byelorussia, cilicia, clementia, consortia, cratia, croatia, demattia, depopulation, derusha, desha, dorotea, dusza, elisha, espitia, felicia, galusha, geisha, gosha, gousha, harsha, horatia, ignatia, inertia, ingrassia, jerusha, kaisha, kasha, kasza, katyusha, kenosha, kisha, kulesza, lamantia, latasha, latisha, leticia, lucia, lucrecia, lucretia, mantia, marcia, marsha, mattea, militia, mischa, misha, musha, myrtia, natasha, niclaneshia, osha, patricia, phoenicia, placentia, porsche, portia, prusha, prussia, russia, sasha, scotia, serbo-croatia, st_lucia, tasha, terentia, tricia, trisha, urrutia, ustasha, valentia, vincentia, vitia, waukesha, xhosa
Tertia sounds like:
tarditi, tardy, tarot, tarred, tart, tarte, tartt, tattered, teetered, terada, teradata, terre-haute, territo, tethered, there'd, theriot, third, thirtieth, thirty, thordia, thread, threaded, threat, threatt, threet, throat, throated, throaty, thwart, thwarted, thyroid, tiered, tirade, tirado, tired, torrid, tort, torte, torti, toured, tourette, toward, towered, trade, traded, trait, traudt, traut, trauth, tread, treadaway, treadway, treat, treated, treaty, tredway, trethewey, triad, tried, trite, tritt, trod, trot, troth, trott, trotted, troudt, trout, troutt, troyat, truda, trude, trudeau, trudia, trudie, trudo, trudy, truett, truitt, truth, tryart, tryout, turret, tutored, twardy