chemical science vs carburize

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

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

chemical science (noun)	carburize (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)	carburize (verb)
	unite with carbon