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.
fillip flip flippy flap flop flappy floppy
fillip lip wallop tulip dollop slipe slip pullup gallop lollop collop clip flip blip lipe lipa shallop
fille filly fillo fill fil fell villae file vill fila full felly follow fellah filo fellow felloe fail foil fella folly fallow fully fall villa faille villi