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.
shimmer shimmery shammer chimer shmear chimera chimere chimaera chummier chimar chamber
limmer rimmer dimmer shimmer simmer wommera hummer hammer dammer summery dimer limier chummier timber chimer hammier chimera mimer maimer mummery rammier rimier rammer yammer hemmer timer emmer summer gemmier mummer bummer jammer rimer jammier rummier mammer aimer rummer limber chimere gummier gummer gammier gammer cummer shammer shimmery yummier