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.
front frond forint frowned friend variant phoronid
front rant current courant cornet horrent jurant rent runt aroint hairnet aroynt arrant pronto parent hydrant gurnet tyrant grant baronet brant burnt currant coronet carnet hornet gerent forint errant frond brent burnet brunt print learnt rerent grunt torrent garnet warrant