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.
farmer firmer former framer
armer firmer former warmer dormer termer wormer charmer harmer ormer farmer creamery primero armor barmier primmer rammer crammer rimmer grimmer grummer rummer crimmer reamer rhymer roamer roomer premier primer trimmer murmur crumber lorimer grimier termor drummer broomier rummier rammier germier rimer creamer brimmer wormier creamier trimer crummier rimier roomier krimmer framer dreamier dreamer groomer chromier
farm fermi firm form forme formee frame from