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.
roughies roughs roughhews roofies roughhouse roves rives raphes raphis rufous revues reives ruffes reifies reviews revoice raphias revs rifs refs reifs raves roofs reefs ruffs riffs reaves reeves refuse revise
toughies roughies ghis ghees hives gives sophies chiefs chives shives