secretarial vs secretary

secretarial is not a noun while secretary is a noun.

Word	Noun	Adjective	Verb	Adverb
secretarial	No	Yes	No	No
secretary	Yes	No	No	No

secretarial (noun)	secretary (noun)
	a desk used for writing
	an assistant who handles correspondence and clerical work for a boss or an organization
	a person who is head of an administrative department of government
	a person to whom a secret is entrusted

secretarial (adjective)	secretary (adjective)
of or relating to a secretary or to a secretary's work