empty-headed vs airheaded

empty-headed and airheaded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
empty-headed	No	Yes	No	No
airheaded	No	Yes	No	No

As adjectives, empty-headed and airheaded are synonyms defined as:

Other synonyms of empty-headed include dizzy, featherbrained, giddy, light-headed, lightheaded, silly.

empty-headed (adjective)	airheaded (adjective)
lacking seriousness; given to frivolity	lacking seriousness; given to frivolity