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.
sluffed selfed salified sloughed salved slaved solved sulfid sulfate sulfite sulfide sleeved salvoed sleaved sleighed sealift sleight solvate sulphid sylphid sylvite
luffed bluffed fluffed sluffed gulfed