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.
croaked crocked creaked crooked cracked carked corked crocket grokked cricked cragged croquet cricoid quirked cricket coracoid crocoite corrugate croquette coerect correct crewcut
croaked troaked porked drouked traiked barked wreaked wracked rocked rooked racked harked corked crocked grokked marked parked trocked warked charked reracked narked creaked frocked larked crooked raked carked phreaked cracked beraked freaked forked brooked braked tracked darked borked barracked troked worked sharked
croaky croak crack cracky crake creak creaky crock crook