All 16 words, sorted alphabetically. Group them into four categories of four.
The four category names, easiest to hardest. No words revealed yet.
Theme name plus one word from each category.
Agriculture, fishing, gathering, and hunting are the four primary methods humans have used to procure food across history and cultures.
The Lion (NFL), Piston (NBA), Red Wing (NHL), and Tiger (MLB) are all mascots/names of Detroit's major professional sports teams.
A classic voting booth features a ballot to mark, a booth enclosure for privacy, a curtain to shield the voter, and a lever to record the vote.
Each has a connection to 'bolts': Frankenstein's Monster has neck bolts, a hardware store sells bolts, lightning produces thunderbolts, and a lock uses a bolt mechanism.