peal, peel
morphology
shoe, shoo
Fight Despotism
linguistics
essential, quintessential
portmanteau
hendiatris
If you search for ‘hendiatris’ on the Internet, you will find it easily, but if you search for it in a traditional dictionary, you probably won’t. It is possible that ‘hendiatris’ is a sort of back-formation from ‘hendiadys’, though it substitutes an affix rather than deleting one.