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.
cymenes sameness someones semens siemens simonies symbions seaminess somans saimins simians simoons summons
cymenes hymens lumens limens communes gamines means mensa immunes menus mense miens demeans daemones dimness siemens tameins sameness chimneys rumens manes amines famines lomeins lameness commence gameness imines homines immense bemeans ammines amens daimones someones diamines semens domines mines tameness omens yamens