personnel department vs personnel

personnel department and personnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
personnel department	Yes	No	No	No
personnel	Yes	No	No	No

As nouns, personnel department and personnel are synonyms defined as:

personnel department and personnel: the department responsible for hiring and training and placing employees and for setting policies for personnel management

Other synonyms of personnel department include personnel office, staff office.

personnel department (noun)	personnel (noun)
the department responsible for hiring and training and placing employees and for setting policies for personnel management	group of people willing to obey orders
	the department responsible for hiring and training and placing employees and for setting policies for personnel management