class vs biological science

class and biological science both are nouns.

Word	Noun	Adjective	Verb	Adverb
class	Yes	No	Yes	No
biological science	Yes	No	No	No

class (noun)	biological science (noun)
education imparted in a series of lessons or meetings	the science that studies living organisms
elegance in dress or behavior
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

class (verb)	biological science (verb)
arrange or order by classes or categories