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.
neems nemas neums neumes nims noms pneumas names nomas nomes nomos numbs gnomes nimbus nimious
neems deems seems teems ems seams rems geums gems hemes reams poems nemas memos memes mammees ylems femes bemas demos haems mems beams neums hems ramees semis fems semes demes emus teams emes chemos
neem nema neum neume anemia enema enemy