madcap vs adventurer

madcap and adventurer both are nouns.

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

As nouns, adventurer is a hypernym of madcap; that is, adventurer is a word with a broader meaning than madcap:

Other hypernyms of madcap include venturer.

madcap (noun)	adventurer (noun)
a reckless impetuous irresponsible person	a person who enjoys taking risks
	someone who travels into little known regions (especially for some scientific purpose)

madcap (adjective)	adventurer (adjective)
characterized by undue haste and lack of thought or deliberation