flyaway vs scatterbrained

flyaway and scatterbrained both are adjectives.

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

As adjectives, flyaway and scatterbrained are synonyms defined as:

Other synonyms of flyaway include flighty, head-in-the-clouds.

flyaway (adjective)	scatterbrained (adjective)
guided by whim and fancy	lacking sense or discretion
(of hair or clothing) worn loose	guided by whim and fancy