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.
flense flans flanes felons felines fluency fulness valence villeins vileness fullness fellness foulness felonies violence felonious fallowness flounce flouncy valency valines violins valonias villains violones
flense lense lenos lenis lenes leans lanose villeins lens cleans galleons galenas glens mulleins oleins poleyns rellenos silence xylenes woolens colleens linsey liens colonise aliens baleens bluenose bullnose valence violence lionise cleanse galleins gleans melenas mullens pleons pollens salience silenus toluenes woollens