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.
hombres homers humors hammers hemmers humerus hummers humours humorous
hombres timbres ombres immures ombers ambries imbrues timbers daymares sambars mimbars chambers numbers embars lumbers limbers lambers cumbers cambers umbers embrues ambers lumbars lemures mares members tamburs samburs bemires meres gambirs embers combers mires mores mures bombers umbras chimeres