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.
creates crates curates carates curettes cruets greats cartes grates carats creeds carets curets karates croutes curites curtesy cowrites courtesy corrades crits creds carts courteous greeds credos karats greets groats krauts curtsy courts crudes grades korats gratis kraits quartes cardias garrets carrots caritas garotes crowdies corridas grottoes keratose garottes corodies keiretsu corrodes garrotes corrodies grits curds garrottes cords cruds grads karts cards grots quarts cairds crowds gradus grides griots grouts kurtas quirts curtsey gourdes grottos quartos
creates laureates rates reatas berates barrettes ariettes aretes grates reties carates curates crates narrates parietes pirouettes proettes certes serrates syrettes derates hydrates treats aerates burettes phorates muriates varieties hearts gyrates cartes borates curettes variates greats quartes karates ferrates orates pirates prates cerates seriates sureties deaerates derats treaties urates
create carat carate caret crate cruet curate curet curette great ocreate