Answer:
Before Mt. Everest was discovered as the highest mountain in the world, which mountain was the highest?
What can you never get rid of when you lose it?
These are believed to be found at the end of rainbows
What is born on the ground but floats to the sky, to be returned back again from the clouds up high?
Lots of them make up a word, And lots of words are in them. It's easy when you think about it. A while ago we stamped and mailed them.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?