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.
skell skull skill seagull scall scull skoal sokol squall squill squeal sickly sequel sickle suckle cecally sequela squally squilla sequelae squillae
skell keel kelly kill koel quell akela vakeel likely nickel skill skull deckel shekel yokel
sake sike skee skew skiey soke syke askew