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.
grotty gritty grouty grotto grot garotte griot grout groat grody garrotte garote garrote carroty grit grat grate great greet crowdy greedy garret carrot corody croute corrody cowrote curette
grotty ratty trouty pretty rooty rotte rutty borty bratty forty fretty carroty garotte garrotte gritty grotto grouty parroty dorty shorty