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.
sluffs selfs selloffs sulfas sloughs salifies selves sylphs silvas selvas salves solves slaves salvos sylvas slaveys sleaves sleeves sleighs slieves salivas salvias salvoes sulphas
luffs bluffs fluffs sluffs luffas bailiffs blaffs boiloffs falloffs cliffs gliffs gulfs pilaffs selloffs
sluff self slough sloughy sulfa sulfo