>>>>Neither is (air)plane or (passenger) train, yet we're instructed to deplane and detrain.
>>>
>>>Of course, "train" is a verb, just having no relationship that I can see to the noun. Wait, now I see it. When you "train" something, you teach it to follow a particular path, kind of like the one the train has to follow.
>>>
>>>Tamar
>>
>>That's why i put the (passenger) in, to show that the noun "train" is being used as part of the verb. Sure I can see that conceptual link. So to detrain should be to forget everything you learnt.
>>
>>Oh, and deplane is to make the surface of the wood rough again.
>
>From my daughter's class - someone just corrected someone, that the proper plural of "childhood" is "childrenhoods". Corollary: mousepad - micepads.

That's like saying that collective humanity is humanities, which we all know is a doddle of a degree course