I got blue today with a different category in mind; I thought they were all homophones (wood, chock, kernel, cafe, although the latter is more of an abbreviation for a cafeteria in like a school or office pronounced caff, rather than a standalone restaurant which would of course be café). I also went back and forth a bit about what words related to fairy tales (didn’t have HCA in mind, I’m not sure I knew he wrote the Emperor’s New Clothes and the Princess and the Pea anyway, though I knew he did Little Mermaid) and which ones were pigs, having temporarily forgotten about Napoleon and also Piglet, for some reason.