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.
baron barony barn baronne boron brown bairn barny barney briony barren browny bran born bren burn brin brownie brine bruin burin borne brawn brain buran briny bourn borane boreen bourne brainy branny brawny burnie byrnie biriani
baron learn frown virion crony crown corona marron drown earn prone cairn irone hyperon neuron perron carny groin brown diuron yarn sharn reearn heron sarin varna chorion giron hereon krone tarn garron trone karn warn heroin moron morrion roan airn prion neurone pereon irony carn pyrone durion maroon morion crone garni croon barn barony carrion boron grown gyron whereon krona turion groan trona kroon bairn shairn drone barny darn iron saran sharny yearn
bar bro bare barre barrio barrow bear biro boar brio broo brow kbar