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.
rachis reaches roaches ratches ratios rashes ruches riches roshis rishis retches rouches rotches rechews rechose rechoose reechoes wretches reshes rushes reshoes reshows rushees
chis lichis litchis chichis rachis maches laichs hooches mochas machs fichus pitches gotchas catches cooches quitches vetches lochs watches etches nautches coaches ouches pooches duchies peaches vouches sauchs fetches aitches riches butches dashis techies quaichs matches sheuchs witches tachs ditches sushis ruches roaches reaches pachisi nitchies naches mouches touches hootches ketches hutches rotches hotches itches cutches beeches leaches eches leeches bitches liches boches botches teaches dachas pachas chais heuchs retches loaches shies wretches gouaches echos douches fiches gauchos mashies machos wiches beaches miches hoochies batches ichs couches hitches roshis baches hatches fitches caches quaiches quiches mutches tushies aches laches letches leches muches lyches nachos latches wyches facias vichies patches techs notches pechs poaches chias pouches niches ratches rishis rouches seiches datchas taches mooches nachas yechs
rash ratch reach rechew rich roach ruche arch archaea brach brachia orach orache trachea tracheae