Portuguese man-of-war vs man-of-war

Portuguese man-of-war and man-of-war both are nouns.

Word	Noun	Adjective	Verb	Adverb
Portuguese man-of-war	Yes	No	No	No
man-of-war	Yes	No	No	No

As nouns, Portuguese man-of-war and man-of-war are synonyms defined as:

Portuguese man-of-war and man-of-war: large siphonophore having a bladderlike float and stinging tentacles

Other synonyms of Portuguese man-of-war include jellyfish.

Portuguese man-of-war (noun)	man-of-war (noun)
large siphonophore having a bladderlike float and stinging tentacles	large siphonophore having a bladderlike float and stinging tentacles
	a warship intended for combat