Hilarious Microsoft Word Screwup

I was writing an essay the other day and, well, when you write philosophy you tend to make up words that sound real but might not be in a dictionary. For example, just add -ify or -ness or better yet, -edness to words. Like: thing→thingify→thingness. Or: constrict→constrictedness. I can't even do justice to some of the crazier words I've read. Anyways, Microsoft Word has a hard time with this kind of English and I managed to confuse it with my use of the word 'tenderest.' Word didn't like any of its own ideas, apparently.