purify vs chemical science

purify is not a noun while chemical science is a noun.

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

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

purify (verb)	chemical science (verb)
remove impurities from, increase the concentration of, and separate through the process of distillation
make pure or free from sin or guilt
become clean or pure or free of guilt and sin