security force vs personnel

security force and personnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
security force	Yes	No	No	No
personnel	Yes	No	No	No

As nouns, personnel is a hypernym of security force; that is, personnel is a word with a broader meaning than security force:

security force: a privately employed group hired to protect the security of a business or industry
personnel: group of people willing to obey orders

Other hypernyms of security force include force.

security force (noun)	personnel (noun)
a privately employed group hired to protect the security of a business or industry	group of people willing to obey orders
	the department responsible for hiring and training and placing employees and for setting policies for personnel management