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.
quarts quartos quartes quirts quartz karts carts carets kurtas curtsy cartes carats karats courts guards curets curates carates caritas curtsey karates garotes curtesy carrots garrets curites courtesy queridas curettes garrotes garottes grots curds crits grits cards garrottes courteous korats greets groats gratis griots cruets gourds crates kraits krauts grates cairds grouts greats cardias grottos creates croutes gourdes cowrites grottoes keiretsu keratose
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
quarried quart quarte quarto guard querida queried quired quirt squared squawroot