Too many letters

Question: Which eight-letter word still remains a word after removing each letter from it?

Question: What do you get when you cross a witch with sand?

Question: What do you call a sad bird?

Question: What can be broken but never forgotten?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: What tastes better than it smells?