officer vs policewoman

officer and policewoman both are nouns.

Word	Noun	Adjective	Verb	Adverb
officer	Yes	No	Yes	No
policewoman	Yes	No	No	No

As nouns, policewoman is a hyponym of officer; that is, policewoman is a word with a more specific, narrower meaning than officer:

officer (noun)	policewoman (noun)
a member of a police force	a woman policeman
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

officer (verb)	policewoman (verb)
direct or command as an officer