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.
carrots carts garrotes cartes carets carats garrottes garotes garrets carates caritas croutes karts crits corrodes cards grots garottes corrodies crowds groats credos grouts curets quarts courts cruets crates curtsy cairds griots karats curites curtesy karates quartos curates curtsey grottos quartes creates cardias courtesy crowdies curettes corrades corodies corridas cowrites grottoes courteous creds cruds grits curds cords creeds grates gratis greats greets guards korats kraits krauts crudes quartz quirts
carrots parrots pierrots rots cheroots roots worrits rotas riots rotos territs ferrets tarots rotis rotes grouts trouts groats griots barrets grots droits heriots terrets garotes trots garrets turrets garrotes chariots routs sheroots
carrot carroty carried corrode corrody garrote garrotte acaroid scarred