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.
limber limbier lamber limier limmer lumber lambier lamer lumbar loamier lemur
bomber amber lamber number chamber camber limber omber member lumber dumber cumber umber comber ember somber timber rimer boomer ambry homer doomier ameer jammier lamer maimer gamer limier ombre mammer omer mere sambar embar namer roomer hammer sombre emery roamer hummer fumier seamer teemer yammer shimmery shammer chimere chimer woomera womera umbra timer timbery dimer homier tambur smear summery hombre loamier hemmer mimbar gemmier reamer rummer beamier seemer ambeer rimmer sambur mummery gammier dammer ambery gammer aimer bummer simmer emmer rummier cummer foamer gomer gamier vomer rammer mummer lumbar gambir camera jammer emeer gummer fumer summer mimer foamier comer seamier lambier limbier rhymer hammier rimier rammier dimmer gambier gummier tamer roomier boomier timbre humeri wombier wommera limmer chimera chummier shimmer shmear yummier
limb limbo limby limba limbi blimey slime limy glime lime clime lamb blimy limey lambie climb limo glim lima slim lamby slimy