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.
fall fallow faille fell fill full foal feal fail felly fille filly folly fella fully fillo felloe valley phalli follow fellow fellah foully flu fil fly fila fowl foul floe veal fuel vial flee filo foil flow vail flea vill feel vale file fley fool flay flue flaw flew value villa feyly vealy flawy phial ghyll folio folia foley villi
all ball fall hall call gall lall mall pall sall tall wall shall al