chemistry vs atom

chemistry and atom both are nouns.

Word	Noun	Adjective	Verb	Adverb
chemistry	Yes	No	No	No
atom	Yes	No	No	No

chemistry (noun)	atom (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	(physics and chemistry) the smallest component of an element having the chemical properties of the element
the way two individuals relate to each other	(nontechnical usage) a tiny piece of anything
the chemical composition and properties of a substance or object