Crossword puzzles flex one very specific piece of cognition--the ability to find words, which is also known as fluency. Fluency is a type of process based in the speech and language centers of the brain. So doing crosswords might help you get better at word finding, but that's the sum total of their positive benefits to your brain.
misnomer. n. 1. an incorrect or unsuitable name or term for a person or thing. 2. the act of referring to a person by the wrong name.
Misogynoir is misogyny directed towards black women where race and gender both play roles in bias. It was coined by queer Black feminist Moya Bailey, who created the term to address misogyny directed toward black women in American visual and popular culture.