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.
filet fillet fleet filed failed violet filled foiled felt flit fled filiate flat fluty flute flout float flyte valet fault flued field fluyt flied flite flota fulled fealty faulty fouled flauta felled vialed foaled floaty flutey fooled fowled vailed veiled folate fueled fellate vialled violate fallout foliate folioed fuelled velleity fold volt
filet toilet let hailed vailed piled hilt palet gilt bolete jilt veiled owlet guiled fleet built milty quailed collet boleti cleat failed muleta bluet kilt millet cullet tailed chalet willet delete whiled wailed silt toiled guilty tiled riled quilt bullet pullet sleet piolet sailed mailed roiled nailed relet filed pallet galleta ailed violet valet blet gallet pilot foiled fillet gullet wiled coiled mullet callet culet jailed moiled howlet bailed mallet gleet reoiled ballet billet boiled leet oiled bleat kilty quillet pleat guilt milt lilt heiled tilt wilt ceiled sallet silty railed soiled doiled rillet tilde pellet wallet childe
file fil foley flue floe fley flew flee flea filo filly fillo fille fill fila faille fail foil vile