UnScramble this Word: e r o s d r m?

Questions

Definitions : The weight at the end of a pendulum is a(n) ________.?

Definitions : The wide wall built along the banks of rivers to stop flooding is a(n) ________.?

Definitions : The word "cumulus" refers to a type of ___________.?

Definitions : This instrument is used for measuring the distance between two points, on a curved surface.?

Definitions : This instrument measures atmospheric pressure.?