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.
wrick rick wrack wreck rickey rack reck rock ruck wreak rocky roc rec rig rake raki raku reek rook ryke
rick wrick ick pick wick nick dicky mick sicko rock lick reck rack picky kick quick icky hoick hick ruck wreck kicky wrack sick dick tick chick