Costars rhymes with:
mostar's, mostar's, mostar's, ansgar's, armoires, bednarz, cesarz, exemplars, finbar's, gancarz, lazarz, lenarz, lorimar's, mostar's, polysar's, solarz, stolarz, tokarz, weglarz, zabar's
Costars sounds like:
cadres, casters, castro's, castrucci, caterers, caters, catharsis, cather's, cathers, catheters, cauterize, cauterizes, cedars, cedras, cedras', cedras's, cedric, chatterjee, cheaters, cheddars, chesters, chitra's, citric, citrosuco, citrus, citrus's, coasters, coauthors, codrescu, codrescu's, costa_rica, custer's, cutters