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.
curtsey curtsy curtesy courtesy curets courts curites curates curettes carts curds crits courteous quarts crates carats quirts carets cruets kurtas cartes carrots carates quartos croutes creates quartes caritas keratose cowrites cruds grits grots creds cards cords karts griots quartz crudes karats guards crowds gratis kraits groats greats credos grouts korats greets gourds creeds krauts cairds grates cardias garotes garrets gourdes grottos karates
curtsey artsy courtesy curtesy curtsy mortise
curt court curate curet curette curite