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