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.
bars bares bears boars barres bris burs bras bros barrows barrios byres bries broos boors biers buhrs brays brees burrs brows braws beers brose biros briss burse brosy brews birrs bores buras brass birse boras brios braes bursa braise brassy brughs bursae boreas browse burros burghs bruise buries bourse hybris borrows brassie berries bewrays bureaus burrows bourrees brace braza braze
ars bars pars nears gnars lears maars bears boars ears guars fears feuars tears dears wears sears shears rears fiars vars gears oars knars mars lars liars cars jars gars haars hoars hears tars soars wars roars chars pears years