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.
rumors rumours remorse remoras rummers rimers rammers reamers rhymers rimmers roamers roomers reimburse reimmerse remarries
mors humors tumors rumors dammars timers emirs mirs dimmers simars summers rumours chimers femurs lemurs mars gomers foamers vomers hemmers rummers shimmers tumours tamers homers humours emmers gamers maimers memoirs seamers omers reamers remorse rimers roamers hummers mummers simmers boomers fumers mammers amirs mores moras hammers chimars amours remoras gammers cummers mimers rhymers morse demurs gummers rimmers moors limmers namers teemers tambours dimers dammers damars seemers shammers cymars bummers aimers jammers roomers rammers comers yammers
rumor rumour remora rummer rummier armoire armor armory armour armoury crumber crumbier crummier grummer drummer