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.
brunet brunt brunette burnet baronet burnt brent brant braunite barned burned brined bornite brained branned browned burnout brownout brand brandy
brunet hereunto truant gurnet garnet crownet coronet cornet carnet hornet hairnet rennet burnt burnet brunt baronet runty runt grunt pruned whereunto
barn barney barny born borne bran branny bren brin brine briny bruin burn burnie byrnie