antiquary vs expert

antiquary and expert both are nouns.

Word	Noun	Adjective	Verb	Adverb
antiquary	Yes	No	No	No
expert	Yes	Yes	No	No

As nouns, expert is a hypernym of antiquary; that is, expert is a word with a broader meaning than antiquary:

antiquary (noun)	expert (noun)
an expert or collector of antiquities	a person with special knowledge or ability who performs skillfully

antiquary (adjective)	expert (adjective)
	having or showing knowledge and skill and aptitude
	of or relating to or requiring special knowledge to be understood