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.
gliff cliff cliffy golf gulf calif gulfy kalif glaive coalify qualify calf clef
bailiff gliff cliff luff selloff alif relief belief nullify blaff lowlife cliffy kalif lief life bluff falloff fluff vilify jellify jollify calif coalify boiloff qualify mollify pilaff salify sluff