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