C'est rhymes with:
assessed, obsessed, reassessed, recessed, abreast, acquiesced, addressed, addwest, arrest, assessed, attest, behest, bequest, best, beste, blessed, blest, breast, brest, bud-test, caressed, celeste, chest, chrest, coalesced, compressed, confessed, congest, crest, d'allest, depressed, dest, detest, digest, digressed, dispossessed, distressed, divest, dressed, eastern-west, este, expressed, farwest, fessed, fest, finessed, gest, guessed, guest, impressed, indigest, infest, ingest, invest, jest, key_west, lest, messed, mest, midwest, molest, natwest, nest, neste, northwest, norwest, obsessed, oppressed, penwest, pest, possessed, pressed, prest, professed, progressed, quest, rearrest, reassessed, recessed, reinvest, repossessed, repressed, request, rest, retest, self-professed, southwest, stateswest, stressed, suggest, suppressed, telequest, telewest, test, transgressed, trest, unaddressed, undressed, unimpressed, unrest, vest, west, wrest, yest, yoest, zest
C'est sounds like:
c-code, c.o.d., cached, cachet, cacti, cad, cada, caddy, cade, cadet, cadotte, cady, caged, cahoot, cahouet, caicedo, caito, caked, caouette, casad, casada, casado, casady, cascade, cascaded, casciato, cashatt, cashed, casket, cassada, cassaday, cassady, cassata, cassatt, cassedy, cassetta, cassette, cassetty, cassiday, cassidy, cassity, cast, casta, castaway, caste, castio, casto, cat, cat-2, cat-3, cat-4, cate, cathay, cathey, cathie, cathode, cathy, cato, catoe, catt, catto, catty, caught, caused, cawood, caywood, cd, ceased, cede, ceded, ceta, chad, chadd, chait, chajet, chased, chaste, chastity, chat, chateau, chato, chatted, chatty, cheat, cheated, cheatwood, checked, checkout, cheeked, cheesiest, cheetah, chest, chested, chet, chewed, chiat, chicked, chide, chided, chideya, chiodo, chiquita, chit, chita, chitty, chitwood, chiyoda, choat, choate, choicest, choked, choquette, chucked, chudy, chugged, chute, cicada, cid, ciotti, cist, cite, cited, citi, city, citywide, ciudad, coached, coad, coady, coast, coasted, coat, coate, coated, coaxed, cockatoo, cocked, cockeyed, cod, coda, coday, codd, code, coded, cody, coed, coexist, coexisted, cogitate, cohasset, cohost, coit, coody, cooked, cookout, coot, coote, cosatu, cosette, cossat, cosset, cossette, cost, costa, coste, costed, cot, cota, cote, coto, cott, cotta, cottee, cotto, cotty, coty, couched, couchette, coughed, cousteau, coutee, couto, coutu, cowed, coweda, coyote, cozad, ct, cudahy, cudd, cuddihy, cuddy, cude, cued, cuesta, cueto, cuidado, cussed, custodio, custody, cut, cutaia, cutaway, cute, cutout, cutty, cyd, cyst