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.
callous callus gallous callose calls calos gallus callas callees gallows clues coals galls cloys close cauls coalless culls cullis clause caulis coulis coleus coalas caules calesa cullays colossi cullies collies gallies galleys coulees gals cols goalless coulisse coalesce galleass galliass clews gloss kales claws cloze gaols colas glues gulls kills gales class coles kails clays coils kolos cowls cools kilos galas goals glows classy quills galahs quails glossa koalas galeas colies kayles quells glossy quolls coolies glossae goalies gulleys gullies kellies killies
bullous callous villous gallous willows pileous delouse malleus pilous gallows mellows louis lilos halloas fillos callose hallows bellows alloys sallows shallows hellos allows lousy follows louse halloos hilloes holloas holloos hollows hulloes hullos jealousy callus tallows helloes billows zealous mallows duellos gallus cellos holloes niellos hilloas lulus hollos bilious folious phallus villose blousy chylous pillows wallows felloes phyllos halloes villus hillos blouse hulloas hulloos jealous jellos hallos fallows fellows yellows
callow call calo calla callee scall