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.
quiches quaiches quitches quaichs cutches couches quashes cuishes gouaches gushes coshes cashes caches cooches ketches gauchos catches coaches cashews gashes cachous cashaws cashoos cushaws gotchas
fiches wiches miches riches quiches quaiches niches seiches liches ichs beaches gouaches eches fetches latches chews echoes aitches botches batches fitches matches lichis quaichs leeches lychees rechews patches fishes pishes ketches lichees hitches coaches reaches etches witches hooches watches techies taches duchess ditches cooches ruches rotches pouches boches reechoes couches laichs poaches quitches caches cutches hotches muches fitchews notches loaches mutches hatches hoochies knishes rouches leaches leches whishes vichies lyches itches butches bouchees catches baches hootches retches laches chess aches wretches vouchees nautches wyches naches bitches maches vetches peaches fichus cuishes mooches beeches vouches nitchies hutches mouches ouches pitches pooches ratches roaches letches dishes douches duchies teaches touches wishes chichis