chemical science vs thoriate

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

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

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

chemical science (verb)	thoriate (verb)
	impregnate with thorium oxide to increase thermionic emission