unsubstantial vs aeriform

unsubstantial and aeriform both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unsubstantial	No	Yes	No	No
aeriform	No	Yes	No	No

unsubstantial (adjective)	aeriform (adjective)
lacking material form or substance; unreal	resembling air or having the form of air
	characterized by lightness and insubstantiality; as impalpable or intangible as air