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.
griots grots grits grouts groats grottos garotes grids crits grottoes garrotes garottes greats grates greets grides kraits gratis garrottes garrets croutes carrots curites caritas cowrites carts karts grads curets crates gradus curtsy kurtas greeds krauts credos gourds korats crowds grades courts carets karats quirts cruets cartes carats guards quarts quartos curtesy curtsey karates gourdes cardias curates quartes carates creates corodies corridas corrodes courtesy crowdies curettes keiretsu keratose queridas
riots heriots griots chariots tarots fruits rotos sorts grots rotis dirts curites cheroots cerites ports routs yperites trots morts norites kraits cowrites shirts grits forts worts torts verites borts britts burritos peritus garrotes whorts airts veritas iritis caritas barites writs pierrots parrots frits garotes radios brits bruits fritts rites orts rots pyrites ferrites frites girts carrots roots crits raitas lariats writes traits groats rotas droits diorites sorites rewrites rotes worrits sheroots periods neuritis merits quirts grouts trouts territs shorts
griot garote garotte grid gride grit gritty groat grody grot grotto grotty grout grouty