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.
squillas squills squalls sculls skulls skills squeals sequels seagulls skilless skells siglos scalls cicalas sickles suckles sicklies suckless sequelize scales scowls skoals socles sokols
squillas callas cullays kills quillais quills aiguilles coquilles maquilas rocailles skills squills tequilas
squill squilla squillae squall squally