useless trivia: What Word Means: The Whole Lot?

Questions

What nation moved its borders eastward and named an islandMillennium Islandin order to be the first nation to welcome the new millennium?

This french actor appeared in 'The Big Blue' and 'The Professional'?

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

A grabatologist collects ____?

During annual spring floods, this waterfall can become so loud as to break windows six miles away?