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.
brownness baronnes brownies baroness browns brownnose barrenness bareness brionies baronies borons barons bronze brawns brines beeriness barneys brinies boranes bournes byrnies burnies brans burns brins barns brens bronzy burans brains burins bourns bairns bruins barrens boreens burnous birianis burnoose
brownness rawness barrenness ironness greenness lornness narrowness wornness