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.
ruck rack reck rock rick wrack wrick rocky wreck rickey roc rec rug rake rook reek raki ruga raku ryke rakee reeky rekey rogue rooky roque rugae wreak
buck fuck huck guck luck muck puck ruck suck duck tuck chuck shuck yuck