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.
humerus hummers humorous homers humors hammers hemmers humours hombres
humerus gamers dammers maimers bummers bombers gomers lambers dimers numbers mummers rammers embers combers immerse rimers reimmerse rummers chimeres aimers cambers shmears shammers chambers seemers emeers smears boomers wommeras cumbers ambers ameers tamers limmers timbers members umbers roamers ombers cummers mimers roomers reamers rhymers hummers cameras emmers omers namers meres dimerous gummers gammers vomers foamers lumbers summers chimeras jammers numerous hemmers rimmers timers mammers teemers limbers dimmers hammers comers shimmers womeras fumers simmers homers seamers woomeras chimers yammers