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

Which five letter word can be added at the end of below word to form a
valid word?

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

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

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

If a boy blows 18 bubbles,
Then pops 6 eats 7 and then
He pops 5 and blows 1.
How many are left?

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

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

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

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?