parliamentarian vs expert

parliamentarian and expert both are nouns.

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

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

parliamentarian (noun)	expert (noun)
an expert in parliamentary rules and procedures	a person with special knowledge or ability who performs skillfully

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