chemical science vs displacement

chemical science and displacement both are nouns.

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

chemical science (noun)	displacement (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	act of taking the place of another especially using underhanded tactics
	act of removing from office or employment
	the act of uniform movement
	to move something from its natural environment
	an event in which something is displaced without rotation
	(psychiatry) a defense mechanism that transfers affect or reaction from the original object to some more acceptable one
	(chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound