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.
gritty grotty grit griot grouty grotto garotte grid crit grot grat garrotte grate groat gride great greet grody grout krait garret gardai garote curite greedy carroty cowrite curette garrote
gritty fruity charity rarity purity pretty parity grotty verity variety fritt ratty fretty ferity britt bratty rutty dirty shirty