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.
gambir gambier gamier gammier gamer camber gammer gummier gomer camera comber cumber gummer camerae camorra
gambir mir beamier bemire bomber boomier embar ember amir emir fumier hombre gemmier ambry gammier limber lamber lumbar member mimbar omber rammier roomier sambar seamier sombre dumber timber umber wombier chummier limier mair camber lambier miri mire mbira foamier hammier homier miry jammier comber gambier amber cumber gamier gummier limbier loamier lumber memoir number ombre rimier rummier sambur somber doomier tambur timbre umbra chamber yummier
gamb gambia gamba gambe gam gamey agama cambia gama gamay gamy gamma game gaum gombo gumbo gammy ogam