unsubstantial vs shadowy

unsubstantial and shadowy both are adjectives.

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

unsubstantial (adjective)	shadowy (adjective)
lacking material form or substance; unreal	lacking clarity or distinctness
	lacking in substance
	filled with shade