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.
sulfate sulfite sulphate sulfide solvate sulphite salivate selfed slaved sulfid sleaved sluffed sylvite sealift salified sulphide salved slight solved salvoed sleeved sleight sulphid
sulfate valvate volvate vulvate califate kalifate solvate sulfite