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.
tarts tarots torts trots darts trets tortes trouts treats traits terrets turrets tardies territs treaties treatise tortoise tortuous dirts drats turds droits trades derats triads tortas treads dirties teredos tirades toroids triodes
arts karts warts darts parts farts marts hearts tarts harts quarts boarts charts carts greats lariats karates guards rats ratos phorates forts vertus rots ferrates aortas borts parrots berets fortes fards writs lards airts ports tarots frets fortis seriates berates brats nards crits curets quartes brits chards yards shirts cherts worrits rates urates trots treats torts tortas terrets drats derats deaerates sorts certes curtsy pierrots prats quartz jurats ferrets bruts orts morts cartes carrots aerates laureates korats nerts crates frats karats grits curates pirates erratas quirts orates frits cerates cards krauts hoards kraits riatas carets virtus carats girts ruts rets hurts creates gyrates artsy verts carates barrets gratis garrets beards variates quartos kurtas serrates pards grates burets boards muriates narrates bards courts reatas grots prates wards borates merits liards sards derates dirts hydrates hards territs tortes traits trets turrets whorts worts groats shards shorts yurts
tarty tart start stared dart tardo tardy tared tarot tarred tarried teared tort torta torte tret trite trot starred tattered