Buzzword would be Schiller-Duval bodies. However, if you know what a Schiller-Duval body looks like, then "tumor forms glomeroid structures" might as well be a buzzword. In this case, you'd pick yolk sac tumors because that's where Schiller-Duval bodies are located.
I mean, there's only so much they can do to obfuscate the point being tested. If you understand what's going on, everything looks like buzzwords. When I take NBMEs and UWSAs, everything sounds like a buzzword because they are just describing what's going on. Dude comes in with pneumo + diarrhea, might as well tell me it's Legionella, etc etc. Now some people will say "those aren't buzzwords", but I disagree. To me, the real thinking comes in the physiology or research questions. Everything else is just associations. To me, the entire exam feels like a giant vocab/analogy test because that's pretty much what they are testing.
It's only in physio/pharm that you have to know how to think and play with the rules of the system.
Maybe, I'm wrong, but so far, prep for Step 1 has been underwhelming. Uworld is just an analogy/vocab test, the NBMEs are basically a fancy game of matching (save for maybe 10 questions on the exam), and everything is coming down to associations.
We'll see what it's like on the big day, but if it's anything like the NBMEs or Uworld, I don't think I'll be surprised at the vast majority of questions.