Christmases rhymes with:
amos's, grimaces, hippopotamuses, ramesses, thomas', thomas's, thomases, actress's, actresses, addidas's, addidases, adidas's, airbus's, aliases, amos's, apprentices, arias's, atlas's, biases, bonuses, canvases, canvasses, carcasses, cardenas's, catacosinos's, caucus's, caucuses, censuses, cetus's, choruses, circus's, columbus's, congress', congress's, congresses, countesses, crevices, cypress's, dallas's, damascus's, douglas's, douglass, dreyfus's, embarrasses, ethnos's, eyewitnesses, fetuses, focuses, fortas's, fortresses, gavras's, geniuses, goddesses, grimaces, guinness's, heiresses, hippopotamuses, holvis's, hospice's, hospices, illnesses, injustices, irises, kansas's, kotsonis's, lexus's, likenesses, lotus's, lucas's, marcos's, marcus's, mattress's, maxus's, menaces, minuses, nautilus's, necklaces, nicholas's, nicklaus's, norris's, novices, office's, paribas's, poultices, prospectuses, ramesses, refocuses, repurchases, retroviruses, salinas's, sampras's, selinas's, sprogus's, stewardesses, stratus's, surpluses, tennis's, texas', thomas', thomas's, thomases, virus's, waitresses, walruses, wireless's, witness's, witnesses'
Christmases sounds like:
carstens, cherrystones, christening, christianize, christians, christine's, christman's, christmas, christmas', correcting, corrections, correctness, crackdowns, cresting, cristiani's, crocheting, crookedness, crusading