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.
frits fritts fruits frites frats forts frets farts fritz ferities ferrites fortis fortes forties verites ferrets veritas fretsaw verities ferrates variates faradise verts fards fords varieties fiords virtus farads vertus frauds viroids fordoes virtues faradays faradize foredoes phorates virtuosa virtuose virtuoso virtuous
writs crits frits territs worrits grits merits brits britts courts ferrets grids carets jerrids ritz verites fritz burets veritas quirts carats peritus riots girts heriots hurts barrets pyrites iritis airts caritas farts frets morts karts nerts borts harts certes darts shorts cherts chariots burritos warts trots traits tortes korats tarts hydrids drats diorites rewrites quartos sorites curets karats parrots ports hybrids barites norites verts carts marts fortes kurtas rites quarts arts jurats artsy frites hearts rots orts curites carrots jerids pierrots rets curtsy raitas murids fritts quartes berets forts rids boarts bruts ruts cowrites bruits turrets ferrites fruits writes rats cartes trets griots virtus fortis whorts aortas brats lariats grots vertus neuritis garrets kraits frats irids yperites parts cerites sciurids sorts derats dirts droits tarots terrets tortas torts prats worts charts shirts yurts
fritt frit fart ferity fort forte forty frat fret fretty fried fruit fruity afrit