windsock

n.

A truncated cloth cone mounted on a mast, used to show the direction of the wind.

Synonyms:

wind cone, air sock, wind sleeve, drogue, sock

diaper

n. American English

A folded piece of absorbent material, such as paper or cloth, that is placed between a baby's legs and fastened at the waist to contain excretions.

British English: nappy, or napkin.