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.
summons simoons simonies someones symbions semens somans saimins siemens simians sameness simonize seaminess
gammons commons mammons summons mons lemons daimons kimonos daemons moons muons simoons moans gnomons bemoans monas ramonas cummins daemones camions daimones monos demons