officer vs police force

officer and police force both are nouns.

Word	Noun	Adjective	Verb	Adverb
officer	Yes	No	Yes	No
police force	Yes	No	No	No

officer (noun)	police force (noun)
a member of a police force	the force of policemen and officers
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)	police force (verb)
direct or command as an officer