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.
kart karat karate cart korat carte kraut quart carat krait kurta caret quarte carate carrot garote quarto garret garrote carroty garotte grot curt grit crit grat garrotte card court grout great griot greet curet cared caird guard crate cruet groat garda grate quirt
art boart fart hart heart cart kart quart mart part peart dart tart wart chart