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.
herma hermae hermai herm harm harem hareem
herma derma uremia tryma tarama diorama serum germy derm seriema prima hyperemia maremma korma karma grama coremia germ rearm aroma hermae herm viremia fermi berme berm neuroma perm hermai drama term uraemia chroma
her hear heir here hero herry hoer