worker vs working class

worker and working class both are nouns.

Word	Noun	Adjective	Verb	Adverb
worker	Yes	No	No	No
working class	Yes	No	No	No

worker (noun)	working class (noun)
sterile member of a colony of social insects that forages for food and cares for the larvae	a social class comprising those who do manual labor or work for wages
a person who works at a specific occupation
a member of the working class (not necessarily employed)
a person who acts and gets things done