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.
carts carets cartes carats caritas carrots carates karts crits cards quarts curtsy cairds karats crates courts curets cruets curtsey karates quartes garotes curtesy creates quartos croutes curates curites cardias garrets courtesy garrotes garottes cowrites curettes cruds creds curds grits cords grots garrottes courteous griots creeds gratis credos kurtas quartz kraits grates greats crowds korats groats krauts quirts crudes grouts greets guards grottos corridas corrodes corodies crowdies grottoes keratose keiretsu corrades corrodies
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
carte cart scarred ecarte acarid curt crate carroty carrot carried caried caret cardio cared cardiae cardia card carate carat caird crit kart acaroid scared scart