ethereal vs unsubstantial

ethereal and unsubstantial both are adjectives.

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

ethereal (adjective)	unsubstantial (adjective)
of or containing or dissolved in ether	lacking material form or substance; unreal
characterized by unusual lightness and delicacy
of heaven or the spirit
characterized by lightness and insubstantiality; as impalpable or intangible as air