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.
forgat forgot foregut frigate fracti furcate virgate variegate forecaddie forked fragged freaked frigged frogged frugged freakout
forgat ergot derogate argot arrogate bearcat bract ergate rugate frigate forgot variegate virgate irrigate corrugate meerkat surrogate tract
forgo forego fork forky frag frig frog froggy frug