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.
dromon trombone dormin doorman doormen drayman draymen duramen dairyman dairymen termini tyramine
dromon ramona roman bromin fermion pheromone harmony hormone kairomone ceremony sermon
derm derma dorm dormie dormy dram drama drum