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.
knobs nobs nabs nebs nibs niobous nubs nabes nabis nubias newbies
knobs nobs sobs robs obis obas bobs fobs hobos hobs jobs cobbs cobs boobs gobos gobs kobs lobes lobos lobs mobs nabs nibs kobos nebs nubs obes robes sobas yobs
knob knobby nob knubby nobby snob snobby