adventurer vs Sir Alexander Mackenzie

adventurer and Sir Alexander Mackenzie both are nouns.

Word	Noun	Adjective	Verb	Adverb
adventurer	Yes	No	No	No
Sir Alexander Mackenzie	Yes	No	No	No

adventurer (noun)	Sir Alexander Mackenzie (noun)
a person who enjoys taking risks	Canadian explorer (born in England) who explored the Mackenzie River and who was first to cross North America by land north of Mexico (1764-1820)
someone who travels into little known regions (especially for some scientific purpose)