unsubstantial vs aerial

unsubstantial is not a noun while aerial is a noun.

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

unsubstantial (noun)	aerial (noun)
	a pass to a receiver downfield from the passer
	an electrical device that sends or receives radio or television signals

unsubstantial (adjective)	aerial (adjective)
lacking material form or substance; unreal	existing or living or growing or operating in the air
	characterized by lightness and insubstantiality; as impalpable or intangible as air