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.
frit fritt fruit fruity forrit ferity frat fort fret fart ferrite fried forte forty fretty verity verite ferret variety ferrety ferrate variate ferried ford vert fard farad fared fiord fired fordo fraud freed vertu virid virtu
writ brit forrit frit crit grit merit territ worrit