There is an interesting discussion on wattpad. A romance novelist has a series of novels with the word "cocky" in the title. You know, "The Cocky Bastard," "The Cocky Apprentice." I made up those titles, but that's the gist. So what does she do? She trademarks and watermarks the word cocky. And then has the gaul to go after authors that use the word in their titles (I guess it's popular in romance novels).
This is the link that was posted for the kboards discussion: https://www.kboards.com/index.php?topic=263084.0
Why she was allowed to trademark a common word like "cocky" I have no idea. But it was legit to watermark it. Watermarking is using the word in a certain style. The problem is, the font she chose to use doesn't allow her to do that and now she's in trouble with the font owner.