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.
peags pegs peaks pacs pugs pecs pigs picas pacas packs peeks paiks pekes pikes pecks pikas pokes pukes pekoes piques pokeys pokies pax piggies pics
peags ags fags vagus hags jaggs jags gags egos kagus quags leaks eggs mags raggs regs sagas sags segs dagos degas teaks tegs wekas yags pegs keas megs negs bags agas queasy kegs lags legs beaks magus nags negus begs peaks ragas rags wreaks sagos segos zags dags tags teggs wags shags yeggs
peag peg peak peaky apeak speak