wraithlike vs insubstantial

wraithlike and insubstantial both are adjectives.

Word	Noun	Adjective	Verb	Adverb
wraithlike	No	Yes	No	No
insubstantial	No	Yes	No	No

wraithlike (adjective)	insubstantial (adjective)
lacking in substance	lacking material form or substance; unreal
	lacking in nutritive value
	lacking solidity or strength