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.
fault faulty vault fauld vaulty flauta fealty flit felt fallout flat flute filet flyte flite fluyt fluty fleet flout valet float foaled fueled floaty fulled valuta folate failed fouled fillet flutey fellate filiate foliate fuelled vallate valuate fled fold volt
vault fault sault gault alt fealty malt halt moult cauld poult valet culet faulty salty vaulty zealot chalet shalt guilt dealt culti cult alto auld fauld lealty quilt malty built flauta rialto realty alit salt palet chalot yauld
fail faille fall fallow feal foal foul foully fuel full fully