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.
aches aitches ashes
aches etches itches teaches hitches witches rotches hooches wyches batches cooches taches ditches roaches cutches riches notches aitches gouaches mooches leaches beeches vouches caches bitches maches fitches pouches mouches naches peaches muches baches nautches coaches mutches quitches quiches matches botches rouches wiches letches latches eches hutches wretches butches quaiches touches beaches couches watches pitches ouches retches ratches hatches poaches reaches fetches douches patches catches loaches leeches hootches vetches ruches pooches miches lyches liches ketches seiches hotches laches leches niches boches fiches sashes rashes dashes machos tushies hashes whooshes vichies fashes tachs gotchas reshoes cashews quashes techs rechews vouchees rushees rushes chez mushes duchess bouchees sauchs gnashes bashes pachas shushes datchas choushes wooshes techies coshes joshes pashes lushes knishes heuchs reshes wishes mashes gushes lichis cashes lychees shes shews meshes boshes fitchews dishes ashes bushes nitchies hushes noshes chess fichus echoes echos whishes mochas rachis reechoes hoochies deashes gashes toshes lochs gauchos fishes machs chis washes lichees duchies tushes moshes quaichs lashes leashes pishes chews sheas ichs cuishes nachos toeshoes shoes shies nachas pechs mashies pushes laichs dachas chichis sheuchs litchis yechs