Linguistic intricacies have always been a pet subject of mine since high school and perhaps formed the foundation of what I now do for a living, and that is being a writer and editor. Reading an article like this one helps people (including myself) discover the proper ways to use particular words and identify context more correctly.
My favorite among the 20:
Impactful
It isn’t a word. “Impact” can be used as a noun (e.g., The impact of the crash was severe) or a transitive verb (e.g., The crash impacted my ability to walk or hold a job). “Impactful” is a made-up buzzword, colligated by the modern marketing industry in their endless attempts to decode the innumerable nuances of human behavior into a string of mindless metrics. Seriously, stop saying this.