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.
gulfs golfs gliffs calfs clefs qualifies califs cliffs gloves glyphs kalifs kloofs glaives coalifies
gulfs luffs delfs sluffs alefs alfas alifs bluffs fluffs calfs califs clefs golfs kalifs pelfs pilafs rolfs selfs sulfas wolfs