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.
shallow shall shell shawl shale shoal shaly shill shaul sheal challa chally shelly shoaly shaley challie challah shul sial sheol shily cholo shiel chill shool shyly chalah chaleh chilli chilly cholla sheila
fallow sallow callow hallow shallow tallow allow mallow wallow alow yellow willowy alloy pillow halloo halloa follow hollow billow mellow fellow billowy pillowy sallowy tallowy willow bellow hallo yellowy low all