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.
rimier rimer rimmer rammier roomier rummier rammer reamer rhymer roamer roomer rummer rumor remora rumour remarry
boomier roomier gemmier beamier doomier homier jammier gamier rimier chummier yummier seamier gummier fumier hammier limier rummier gammier rammier loamier foamier mir rimer vomer limbier camber bomber namer comber emery hummer roamer miri rammer somber humeri mair lambier simmer limmer number gammer reamer emeer gambir rummer yammer shimmery shammer chimer woomera womera umber timber tamer dimer gummer summery chimere ember mire amir fumer gambier gomer ameer jammer seemer seamer comer lumber summer mummer rimmer bemire maimer mummery mere hemmer member omer dammer mammer roomer miry cumber foamer boomer homer lamber omber hammer amber emir memoir cummer bummer limber camera aimer emmer lamer rhymer smear dimmer dumber teemer timer wombier wommera chamber chimera gamer shimmer shmear mimer
rim rami ramie rime rimy brim crime grim grime grimy prim prima prime primi primo trim