chemical science vs acceptor

chemical science and acceptor both are nouns.

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

chemical science (noun)	acceptor (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	the person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures
	(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated