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.
forts fortes fortis forties frits frats fords frets farts frites fritts fruits fiords fretsaw fordoes ferrets ferities ferrites phorates ferrates foredoes fritz fards verts vertus virtus frauds farads virtues veritas verites faradays faradise variates verities virtuosa virtuose virtuosi virtuoso virtuous varieties
borts ports morts orts shorts worts whorts sorts forts torts trouts carrots ferrets grots writs fortes verts carts heriots vertus virtus routs merits barrets pierrots korats fords nerts grouts lords artsy warts farts quartos roots sords tarts boarts sheroots cherts charts garrotes prats words parrots tortes territs dirts riots droits rats darts rotas carats trets garotes berets rots parts rotis rets grits cartes frats frits harts griots rotes crits karts curtsy quartes quarts hurts quirts bruts marts bortz worrits frets courts garrets arts cords fiords shirts girts brits jurats brats groats certes curets fortis kurtas airts aortas carets burets rotos ruts chords karats drats tarots terrets tortas hearts trots turrets chariots cheroots derats yurts
fort forte forty fart fiord ford fordo foredo forrit frat fret fretty frit fritt