adventurer vs hotspur

adventurer and hotspur both are nouns.

Word	Noun	Adjective	Verb	Adverb
adventurer	Yes	No	No	No
hotspur	Yes	No	No	No

As nouns, hotspur is a hyponym of adventurer; that is, hotspur is a word with a more specific, narrower meaning than adventurer:

adventurer (noun)	hotspur (noun)
a person who enjoys taking risks	a rash or impetuous person
someone who travels into little known regions (especially for some scientific purpose)