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.
sermon ceremony cerumen
sermon ramona chairman dormin doorman ceremony merman carmen carman germen german hormone harmony harmin pheromone airman firman fermion barmen barman airmen kairomone mermen vermin doormen dromon chairmen