biology vs class

biology and class both are nouns.

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

biology (noun)	class (noun)
the science that studies living organisms	education imparted in a series of lessons or meetings
all the plant and animal life of a particular region	elegance in dress or behavior
characteristic life processes and phenomena of living organisms	a collection of things sharing a common attribute
	people having the same social, economic, or educational status
	(biology) a taxonomic group containing one or more orders
	a body of students who are taught together
	a body of students who graduate together
	a league ranked by quality

biology (verb)	class (verb)
	arrange or order by classes or categories