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.
gentoos gents genets gentes genettes giants juntos jennets giantess jaunts joints juntas
gentoos manitos snoots bonitos juntos cantos contos lentos bentos pentose pantos pintoes pintos puntos centos santos snoods tenutos
gentoo gent genet genette agent