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.
poleax poleaxe pollex plex polkas pollacks placks plagues plaques pulques palookas pollocks
poleax lex lax plex silex rouleaux relax pollex poleaxe galax galaxy culex ilex flex flaxy flax telex
polka pollack pollock apolog apologue popelike