The "n" word was evil in the time of Mark Twain, he knew it and used it appropriately, IMHO. The most common use of the word (outside Texas, anyway) is in rap music, which is a shame, because it keeps the word alive. It's considered so bad that its influence has spread. The word "niggardly" means "stingy," but I've seen stories of people attacked for using it, and I wouldn't use it myself, even though it has been a completely useful and fairly common word for centuries.
A lot of the other words that cause conniptions among the socially righteous are hard to parse. I have a friend who refers to himself as queer, although he is not gay, because he identifies with the social/cultural matrix that includes the LGBT folks. I think a word that may capture his entire group would be "woke."