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.
skills skilless skells skulls squills squillas sokols sculls scalls skoals siglos squalls suckles sickles sicklies seagulls sockless suckless scales scowls socles sequels squeals secalose
kills squills quills skills teocallis calls kilos squillas skulls quells gulls skells sculls kails recalls coquilles beguiles aiguilles scalls quolls rocailles callas guiles culls cullis coils callus seagulls begalls quails vakils maquilas gallus squalls galls recoils tequilas
skill sigla sigloi skell skull