harum-scarum vs adventurer

harum-scarum and adventurer both are nouns.

Word	Noun	Adjective	Verb	Adverb
harum-scarum	Yes	Yes	No	Yes
adventurer	Yes	No	No	No

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

Other hypernyms of harum-scarum include venturer.

harum-scarum (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)

harum-scarum (adjective)	adventurer (adjective)
cheerfully irresponsible

harum-scarum (adverb)	adventurer (adverb)
in a wild or reckless manner