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.
carrotier garroter carter grottier quartier courtier groutier garotter curter crater carder garter critter courter quarter grouter crowder curdier grodier criteria corridor cowriter cruddier grittier grater cruder krater corder greater greeter gridder gritter guarder corduroy creature greedier
carrotier rioter chertier troutier tartier purtier partier quartier rooter rootier rotter router artier broider heartier courtier garotter garroter grodier grottier grouter groutier parroter portiere dirtier trotter wartier shirtier
carrot carroty garrote garrotte cart