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.
flosses flossies floosies falsies floozies falces valses fleeces valises phyleses fallacies phalluses fallacious foliaceous
losses glosses flosses callouses palliasses molasses loses colossus closes lasses lessees louses loesses looses glassies lassies plisses xyloses lassoes blesses galleasses blisses glasses pelisses paillasses blouses glossies gallowses floosies galliasses plusses glossas coulisses colessees classes calloses flossies delouses
flossie floss flossy filos filose floes floosie floosy flows