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.
felonies felons felonious felines fellness flanes fulness flounce fallowness foulness valonias violones fullness flans flense villainies flouncy valines vileness villainess
loonies felonies colonies lionize colonize looneys baloneys colones leones lioness lionise clones lunies ballonnes blennies boloneys valonias villainies violones colonise chalones