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.
depones deepness deepens dopiness dippiness dopeyness doupionis douppionis teopans tiepins taipans
depones pones pons yapons repines hypopneas weapons supines ponies deepness spoons chopines youpons lupines poons capons jeepneys hipness eupneas apneas spooneys pions ponce spoonies jupons pines spines rapines opines coupons penes panes gipons peones peonies peons hyponeas cheapness shippons yaupons yupons