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.
cushaws cashaws cashews cuishes cashes coshes gushes kashas cashoos gotchas quashes gashes cachous couches cutches
shaws cashaws cushaws pshaws bashaws geishas reshows pashas kashas cashews sheas shows shews shays shahs chaws sashays