“Aegis” isn’t an Americanism. It’s an Ancient Greece-ism. It’s the name of Athena’s shield. Though it’s come to metaphorically mean protection extended by someone.
I started with the security holes, then with the protections. After that, I wasn’t sure about the gums, but I saw that the rest were all NFL symbols, so I figured it worked. But yeah, that purple category is pretty US-centric.
In Monday, I saw three of the four purples immediately, which insulated me from the red herring @Quimby saw (though I still thought it was a category that I couldn’t find the fourth of, until another word was eliminated from it).
When it got down to the last two categories, I had three in each, and had no idea what baba or hipster were in either context.
Once I got WOODCHUCK COULD CHUCK WOOD out of the way, my brain could focus better on the rest. But I gave up on purple; not sure I ever would have gotten it.