UnScramble this Word: w l b e o?

Questions

Definitions : The covering on the tip of a shoelace is a(n)_________.?

Definitions : The distance around the outside of a circle is its ________.?

Definitions : The earth's atmosphere and the space beyond is known as _______.?

Definitions : The effect produced when sound is reflected back is known as a(n) _______.?

Definitions : The feeling of having experienced something before is known as _______.?