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.
sculls skulls scalls squills squalls squillas seagulls scowls scales skells socles skills suckles sequels sickles squeals secalose sicklies skilless sockless suckless siglos skoals sokols
gulls culls skulls sculls seagulls skills sequels cullis callas quills aiguilles cauls ligules coulis galls macules loculus recalls rocailles equals caulis squalls squills coquilles coequals callus skells calls scalls regulus piculs moguls maculas begalls gallus locules caules quolls quells kills guls gules ligulas oculus squillas teocallis
scull scale scall scaly skull socle oscula oscule