chemical science vs ethereal

chemical science is a noun but ethereal is not a noun.

Word	Noun	Adjective	Verb	Adverb
chemical science	Yes	No	No	No
ethereal	No	Yes	No	No

chemical science (noun)	ethereal (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

chemical science (adjective)	ethereal (adjective)
	of or containing or dissolved in ether
	characterized by unusual lightness and delicacy
	of heaven or the spirit
	characterized by lightness and insubstantiality; as impalpable or intangible as air