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.
fallout flout fault flute fluyt float fluty flota valuta fillet flauta flutey floaty fealty faulty vallate veloute fellate valuate felt flit flat flued filet fauld valet fleet flyte flood vault flite fluid vaulty felled filled foaled folate failed valued fouled fulled volute filiate foliate folioed fuelled vialled
fallout rollout pullout sellout lout flout challot ballute clout reallot allot bailout ballot hallot galloot glout maillot pollute veloute galliot shallot lot
fallow fall faille felloe fellow fillo follow