archaist vs expert

archaist and expert both are nouns.

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

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

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

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