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.
womera wommera woomera wombier
camera womera chimera wommera woomera dimmer member doomier cumber loamier gamer bummer gammer fumer roamer bomber comber seemer gomer foamer gammier umbra lamer hammier boomer emmer humeri boomier camerae jammier remora rimier yammer shimmery shammer chimere chimer teemer mere timer dumber dammer smear seamer roomier limier chamber maimer summer reamer vomer rummier rhymer emeer omber rammer emery comer samara roomer beamier gummer gamier homier number jammer aimer foamier mummer chimaera homer hummer fumier hemmer amber simmer lumber cummer summery limber lamber mummery mara namer gemmier ember mora rammier camber omer mura rimer umber tamer hammer mimer femora ameer rummer rimmer seamier somber dimer gummier limmer timber chummier shimmer mammer shmear yummier