chemistry vs breakdown

chemistry and breakdown both are nouns.

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

chemistry (noun)	breakdown (noun)
the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions	the act of disrupting an established order so it fails to continue
the way two individuals relate to each other	an analysis into mutually exclusive categories
the chemical composition and properties of a substance or object	a cessation of normal operation
	(biology) the process of decay caused by bacterial or fungal action
	(chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance
	a mental or physical breakdown