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.
calfs califs clefs kalifs cliffs calves coalifies caliphs golfs gulfs qualifies clavus clevis gliffs cloves kloofs claves cleaves clivias cloughs kaliphs
calfs leafs delfs selfs loafs alefs alfas alifs blaffs califs clefs golfs gulfs kalifs pelfs pilaffs pilafs rolfs sulfas wolfs
calf calif caliph calve clef cliff cliffy coalify acaleph acalephae acalephe