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.
fossa fossae foss fosse fess fuss foes foys fussy fesse fes fas feus voes faze fees fehs fozy foci fays fuse face vasa visa vows
fossa ossa toss posse fossae lyssa loss assay bioassay boss bossy essay foss assai missay fosse cassia coss koss quassia loess lossy massa moss mossy joss mosso ossia doss tussah