airheaded vs giddy

airheaded and giddy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
airheaded	No	Yes	No	No
giddy	No	Yes	No	No

As adjectives, airheaded and giddy are synonyms defined as:

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

airheaded (adjective)	giddy (adjective)
lacking seriousness; given to frivolity	lacking seriousness; given to frivolity
	having or causing a whirling sensation; liable to falling