It is always ahead of me yet I can never see it. What is it?

There is something which is always coming but never arrives?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

I taste better than I can smell. Who am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

What English word has three consecutive double letters?

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

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?