madcap vs daredevil

madcap and daredevil both are nouns.

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

As nouns, madcap and daredevil are synonyms defined as:

Other synonyms of madcap include harum-scarum, hothead, lunatic, swashbuckler.

madcap (noun)	daredevil (noun)
a reckless impetuous irresponsible person	a reckless impetuous irresponsible person

madcap (adjective)	daredevil (adjective)
characterized by undue haste and lack of thought or deliberation	presumptuously daring