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.
remain reman romaine roman romano rumina ramen rumen ramona
main amain domain remain man leman hominy diamine cummin maun amine bemoan numina imine hemin amino famine ammine mano mean jimminy imino vimina foeman immane showman demean woman toman saimin domino domaine mane human semina soman many romano gamine romaine bayman nomina mina cowman mana mien roman lamina moan jiminy liman daman caiman diamin cayman kamaaina lumina gamin limina mawn lawman layman mine lomein cumin simian seaman rumina reman haemin humane bemean ammino mini bowman amin camion domine tamein wimmin shaman yeoman
rem ream bream cream creamy creme gremmie gremmy premie rearm dream dreamy uremia