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