In one of your tests you ask the question 'does the word embolden mean making a word bold'? to which I answered no, and I was found wrong by your computer.
I like to differ with your computer. The word embolden means: embolden
Until a few minutes ago I'd have told anyone who cared to listen that nobody would use the word 'embolden' to mean 'set in boldface type'. But after doing a BNC search, I see there have been at least three people in Britain who have used 'embolden' this way.
I still haven't been able to find a boldface type sort of definition of embolden in any dictionary, though.