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.
ghylls phyllos ghillies ghouls phallus ghoulies fulls vills fells falls fills follis villas filles villus fellas folles phials fillos valleys fillies fellahs villous villose follows follies fellows felloes fellies fallows failles volleys
ghylls bolls hillos challas knells follis vills tills kayles callus gills dolls fellas culls lolls selles pulls hoyles boulles gallus bulls filles bills niellos callas quolls boylas falls phyllos jells quells nulls yells shells chillis wells tuilles tells dulls dells sills cells rills pills chollas fills wallas hallos tallis zills rouilles paellas mullas failles maills hellos mells hollas mills ells hulls ills quills ballsy alls bells lalls calls nills phallus fillos belles gulls hylas hullos rilles lulls wyles galls fells duellos jellos cullis kills tolls villus fulls knolls challis hills villas sells jills folles molls hollos milles hells malls balls mulls palls cellos dalles talls halls walls chyles ollas polls rolls scillas sylis dills tailles tellys tulles wills chills shills yills
ghyll ghillie phyla phylae phyle phyllo