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.
fillo filo fill fille filly fil fallow faille felloe fellow follow fila foil file fall vill flow floe fail full fell folly folio villi felly fella fully villa flooie foully fellah flooey villae phyllo ghillie flu fly flue vile fuel fowl flew flee veil flay vail fool foal foul feal feel vial fley flea flaw viol
hillo fillo ill dill rouille fallow bill jello hulloa alloy hollow hilly faille gill fill bellow phyllo holloa felloe villa billow rill halloo sallow tuille yellow shallow duello chilli willy kilo will tallow hallo mill niello callow pill mallow lilo sill milo silo hill billy chilly mellow maill dilly pillow illy willow rille till quill scilla hello fellow nill cello hilloa gilly silly kill mouille hollo filo follow vill villi halloa hallow fille mille jill holloo shill hullo hulloo filly allow zill taille wallow chill yill