working-class vs wage-earning

working-class and wage-earning both are adjectives.

Word	Noun	Adjective	Verb	Adverb
working-class	No	Yes	No	No
wage-earning	No	Yes	No	No

As adjectives, working-class and wage-earning are synonyms defined as:

working-class and wage-earning: working for hourly wages rather than fixed (e.g. annual) salaries

As adjectives, working-class and wage-earning are synonyms defined as:

working-class and wage-earning: of those who work for wages especially manual or industrial laborers

Other synonyms of working-class include blue-collar, propertyless.

working-class (adjective)	wage-earning (adjective)
working for hourly wages rather than fixed (e.g. annual) salaries	working for hourly wages rather than fixed (e.g. annual) salaries
of those who work for wages especially manual or industrial laborers	of those who work for wages especially manual or industrial laborers