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.
serener sorner
barrener warrener serener mariner fernery earner burner briner ornery vernier hornier learner darner droner turnery greener barnier careener yarner greenier pornier fernier coroner ironer furriner cornier warner turner dernier sorner churner pruner preener corner mourner loriner kroner greenery garner yearner
serene serein serin serine siren syren