game shows: Fishy character who hosted NBC's Scrabble and Scattegories game shows.?

Questions

A word like 'NASA' formed from the initials of other words is a(n) _________.?

The assassination of what country's Archduke led to World War I?

Hammer, anvil, and stirrup are parts of the ______.?

'Bowser' and 'Jocko' have been two prominent members of what very successful rock & roll nostalgia act?

A grabatologist collects ____.?