explorer vs actor

explorer and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
explorer	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of explorer; that is, actor is a word with a broader meaning than explorer:

explorer: someone who travels into little known regions (especially for some scientific purpose)
actor: a person who acts and gets things done

Other hypernyms of explorer include doer, worker.

explorer (noun)	actor (noun)
someone who travels into little known regions (especially for some scientific purpose)	a theatrical performer
	a person who acts and gets things done