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