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.
roached reached rachet rochet ruched ratchet retched reechoed wretched rushed recheat reshoed reshod
ached cached roached peached poached beached bached leached coached reached hotched pooched reechoed itched letched echoed fashed ashed couched pitched lashed leeched vouched peched etched mouched hashed matched hitched gashed retched eched latched quashed bashed touched pouched watched cashed niched hatched leched miched ruched dashed leashed rachet mooched cachet bitched fetched hutched batched sachet ditched teched patched gnashed notched pashed ouched mashed wretched sashed deashed douched tetched washed botched witched
roach ratch reach rotch rotche rouche brach brachia broach broche orach orache trachea tracheae troche trochee