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.
pechs peaches pachas pachisi patches pitches poaches pooches pouches pashas pashes pishes pshaws pushes
pechs techs yechs matches butches maches datchas tachs cooches bitches roaches lochs gotchas liches poaches fichus ratches quitches hitches quaichs laichs botches etches eches itches machs hootches hatches vetches hutches ouches sheuchs witches wretches watches vouches seiches rouches retches pouches quiches litchis cutches nachos muches leaches douches boches patches nachas echos miches catches mooches ketches niches hotches ditches notches hooches caches baches aches beaches machos latches heuchs fitches pooches rachis leches gouaches gauchos lyches rotches wyches letches fiches ichs batches fetches mutches chichis couches laches quaiches lichis mochas aitches naches peaches reaches beeches sauchs chis mouches wiches pitches coaches pachas riches ruches dachas taches teaches loaches touches nautches leeches