man-of-war

A man whose occupation is fighting in wars; a soldier, a warrior.

A powerful armed naval vessel, primarily one armed with cannon and propelled by sails; a warship.

In full man-of-war's-man: a sailor serving on board an armed naval vessel.

Ellipsis of man-of-war bird or (obsolete) man-of-war hawk (“any of a number of seabirds, especially one which attacks other seabirds to take their food”).

A frigatebird (family Fregatidae), especially the magnificent frigatebird (Fregata magnificens).

The Arctic skua (Stercorarius parasiticus).

Ellipsis of Portuguese man-of-war (“Physalia physalis, a jellyfish-like marine cnidarian consisting of a floating colony of hydrozoans attached to a float”).