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