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.
poems poms pomes pomos pams pommies pimas pumas pomace
poems oms ems neems duomos memos nomes mems noms looms bimboes momus beams emes bemas mamboes homes biomes bombs dooms momes semes booms chemos whomso rems tomes teems coombs poms demes pomes domes roms moues seams somas zooms neums caeomas gems toms moms combs reams pomos teams semis haems comas deems soms doms demos hems hemes seems gnomes rooms nemas ylems homos ohms comes nomos loams nomas roams memes wombs geums emus foams femes fems doums tombs shmoes
poem pom pome pommee pommie pommy pomo ipomoea