biology vs breakdown

biology and breakdown both are nouns.

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

biology (noun)	breakdown (noun)
the science that studies living organisms	the act of disrupting an established order so it fails to continue
all the plant and animal life of a particular region	an analysis into mutually exclusive categories
characteristic life processes and phenomena of living organisms	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