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