What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What is so fragile that saying its name breaks it?

What two things can you never eat for breakfast?

What is at the end of a rainbow?

How can you leave a room with two legs and return with six legs?

I am not alive, but I grow; I don't have lungs, but I need air; I don't have a mouth, but water kills me. What am I?

Let's play a word game. Following are some meaningless words that can be completed by adding random letters on either side of the word.

For example, the word "rdo" can be formed into "pardon".

Using the same technique, can you complete the given words?
ecalc
airb
rinci
tibac
uidel
gorit
igna
eyho

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E