calculator vs expert

calculator and expert both are nouns.

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

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

calculator (noun)	expert (noun)
a small machine that is used for mathematical calculations; can be mechanical or electronic	a person with special knowledge or ability who performs skillfully
an expert at calculation (or at operating calculating machines)

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