explore vs explorer

explore is not a noun while explorer is a noun.

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

explore (noun)	explorer (noun)
	someone who travels into little known regions (especially for some scientific purpose)

explore (verb)	explorer (verb)
inquire into
travel to or penetrate into
inquire into a subject in detail
examine (organs) for diagnostic purposes