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.
tars tares tahrs taros tears tarsi tarres tres tors tarries tyros treys tries dares toras trays tires tiers torsi torus troys terse toros tyres trues dears tours trois tores tress tiros trass trews torse torso trows trios trees truss torrs tories deairs torahs terras terais torose torous tressy triose dairies daresay diaries dearies terries yttrias drys dors dries draws trice duras truce drees trace duros dross druse durrs dorrs dorsa doors dress deers terce drays dures trooz doers
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