pathfinder vs expert

pathfinder and expert both are nouns.

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

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

pathfinder (noun)	expert (noun)
someone who can find paths through unexplored territory	a person with special knowledge or ability who performs skillfully

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