frivolous vs scatterbrained

frivolous and scatterbrained both are adjectives.

Word	Noun	Adjective	Verb	Adverb
frivolous	No	Yes	No	No
scatterbrained	No	Yes	No	No

frivolous (adjective)	scatterbrained (adjective)
not serious in content or attitude or behavior	lacking sense or discretion
	guided by whim and fancy