displacement vs chemical science

displacement and chemical science both are nouns.

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

displacement (noun)	chemical science (noun)
act of taking the place of another especially using underhanded tactics	the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
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