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.
fortes forties forts frites fortis fordoes frats fords frets frits farts foredoes ferrates ferrites ferities phorates fritts fruits fiords verites virtues ferrets fretsaw variates verities fards fritz verts varieties vertus farads frauds virtus veritas faradays faradise faradize virtuosa virtuose virtuosi virtuoso virtuous
fortes cartes tortes certes quartes curates harts ferrites drats ferrates forts garottes carets rets reds barrets rots rates grots grates reties norites artsy hearties ariettes deaerates brutes marts verts barrettes rites burets verites farts hurts garrottes karts cowrites terrets sorites barites hearts burettes crits gyrates tortas pierrots laureates curettes quirts sorts pirates proteus rewrites parts seriates proettes torts muriates trets turrets warts worrits charities pyrites cherts shorties shreds prats dirties prates courts tarots merits quartos variates creates virtues orates ports carates syrettes routes boarts forties rarities curtesy frets parietes berates garrets barytes frits girts merdes hydrates morts territs crates ruts reroutes curets writs brats hordes garotes jurats rotes bardes verities cerites diorites rats karats aerates varieties sorties curtsy fortis korats rottes creds quarts ferrets cerates carrots writes frites vertus carats borts ferities derats karates courtesy parrots kurtas serrates yperites virtus pirouettes parties aortas garrotes frats brits darts curites croutes aretes narrates phorates borates berets parities carts bruts proteas gourdes trots pretties purities derates dirts nerts airts sureties treaties grottoes tarts urates whorts arts worts orts charts shirts shorts grits yurts
fort forte forty fart fiord ford fordo foredo forrit frat fret fretty frit fritt