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.
garrets garrotes greets carets greats garrottes garotes carrots karts grots grits garottes carts karats curets greeds guards grates cartes quarts cruets grides carats gratis grades grouts groats griots creates quartos karates caritas carates gourdes quartes grottos corrodes curettes corrades keiretsu grottoes grads creds corrodies crits grids cards gourds quartz creeds gradus krauts credos cairds korats crates kraits curtsy courts crudes quirts cardias croutes curates curites curtesy curtsey
barrets turrets terrets ferrets garrets rets aretes berets greats treats frets carets pierrots parrots carrots greets keiretsu curets territs cruets trets burets worrits
garred garret garrote garrotte