military adviser vs officer

military adviser and officer both are nouns.

Word	Noun	Adjective	Verb	Adverb
military adviser	Yes	No	No	No
officer	Yes	No	Yes	No

As nouns, officer is a hypernym of military adviser; that is, officer is a word with a broader meaning than military adviser:

military adviser: a military officer who serves as an adviser to the troops of an allied nation
officer: any person in the armed services who holds a position of authority or command

Other hypernyms of military adviser include adviser, advisor, consultant, military officer.

military adviser (noun)	officer (noun)
a military officer who serves as an adviser to the troops of an allied nation	a member of a police force
	someone who is appointed or elected to an office and who holds a position of trust
	any person in the armed services who holds a position of authority or command
	a person authorized to serve in a position of authority on a vessel

military adviser (verb)	officer (verb)
	direct or command as an officer