climatologist vs expert

climatologist and expert both are nouns.

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

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

climatologist (noun)	expert (noun)
someone who is expert in climatology	a person with special knowledge or ability who performs skillfully

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