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.
pneumas nemas neums neumes neems nomas numbs nims noms names nomes nomos gnomes nimbus nimious
pneumas bemas doumas rumbas pumas neums neumes nemas lumas loumas lemmas gummas caeomas geums hyphemias summas dumas mas ems