What is so fragile that saying its name breaks it?

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?

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

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?

Which English verb becomes past tense just by rearranging the letters?

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

What word is pronounced the same if you take away four of its five letters?

_ _ _ 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.

What is at the end of a rainbow?

What will you call your mother's brother's brother-in-law?