chemical science vs iodize

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

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

chemical science (noun)	iodize (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)	iodize (verb)
	treat with iodine so as to prevent infection
	treat with iodine