venturer vs madcap

venturer and madcap both are nouns.

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

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

venturer (noun)	madcap (noun)
a person who enjoys taking risks	a reckless impetuous irresponsible person
a merchant who undertakes a trading venture (especially a venture that sends goods overseas)

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