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.
waterier waterer
jitterier butterier waterier putterer tearier caterer waterer totterer tawdrier deterrer couturier chatterer starrier patterer miterer litterer letterer couturiere potterer fetterer tarrier powderer terrier trier utterer titterer dodderer steerer roturier batterer mutterer pewterer loiterer derriere drier bitterer shatterer
water watery wader waiter watter