I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
quartes quarts quartos quirts cartes quartz curites karates curtesy carates curates garotes garrotes curettes garottes karts carts courtesy courteous garrottes crates guards curtsy grates karats curets courts carats kurtas carets creates garrets carrots gourdes curtsey croutes caritas cowrites grottoes queridas creds grits crits grots cards curds gourds groats grades greeds krauts grides korats cruets kraits greats cairds credos griots crudes creeds gratis grouts greets cardias grottos
cartes quartes arts cerites barytes rates pyrites norites boarts brutes rewrites derates urates pirates tarots borates parties sorites bardes quartos carats fortes muriates charts tortes dirties darts seriates barites aerates ferrates frites virtues courtesy berates laureates crates curates curtesy garrotes karates karts hearties artsy variates certes cowrites harts rotes hearts aretes carts phorates carets parts rites serrates forties verites writes garotes airts creates prates curites yperites ferrites carates marts cerates farts gyrates orates grates narrates quarts deaerates diorites hydrates karats tarts treaties sorties warts shorties
quart quarte quarto quarried quirt squared