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.
cashews cashes cashaws caches coshes gashes cashoos catches quashes coaches cushaws cuishes kashas gushes cooches couches cutches ketches quiches gashouse gouaches quaiches quitches cachous gotchas
shews cashews shes wishes toshes tushies dashes dishes reshows rushes rashes reshes pashes pshaws mushes knishes fashes whishes choushes meshes mashes bushes leashes boshes quashes ashes bashes cuishes hushes bashaws fitchews fishes gashes shies shows shoes chews hashes joshes cashaws sheas cashes coshes mashies lushes lashes gushes cushaws gnashes shaws moshes noshes pishes pushes rechews reshoes rushees sashes deashes toeshoes tushes washes whooshes wooshes shushes
cashew cash cache cashaw cashoo