1. A cask, as a look-out on the main topmast crosstrees of a whaler.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• xrow's nest,
• vrow's nest,
• frow's nest,
• drow's nest,
• ceow's nest,
• cdow's nest,
• cfow's nest,
• ctow's nest,
• c5ow's nest,
• c4ow's nest,
• criw's nest,
• crkw's nest,
• crlw's nest,
• crpw's nest,
• cr0w's nest,
• cr9w's nest,
• croq's nest,
• croa's nest,
• cros's nest,
• croe's nest

The adjective form of the word "crow's nest" is "crow's-nest" or "crow's-nest" without a hyphen.