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.
griot grit grot grout groat grotty grouty gritty grotto garote grat garrote grid crit garotte garrotte grody greet great gride grate krait garret carrot curite croute gardai cardio carroty cowrite cowrote cart curt grad kart
riot griot heriot chariot rot grot cardio verite verity roti cowrote frit ferrite roto rite root fruit garrote curite carroty wrote burrito grit parrot period pierrot pyrite rarity rewrote diorite tarot torot trite trout krait cheroot norite forrit garote merit carrot groat rote write cowrite rout bruit fritt ferity crit britt brit barite grout rota lirot lariat writ parity parroty periti purity yperite rewrite cerite droit territ trait trot worrit charity sheroot