What number replaces the question mark

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

Can you find the odd one out from the below words ?

First Second Third Forth Fifth Sixth Seventh, Eighth Nine Ten Eleven Twelve.

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

What has 88 keys?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

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

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

You can see it everyday, But cannot touch it at will. What is it?