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.
selloffs selfs sluffs salvos selvas selves sulfas sloughs salves silvas slaves solves sylphs sylvas
boiloffs falloffs selloffs loafs loofs luffs bailiffs blaffs bluffs fluffs cliffs gliffs kloofs pilaffs sluffs