wage-earning vs working-class

wage-earning and working-class both are adjectives.

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

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

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

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

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

Other synonyms of wage-earning include blue-collar, propertyless.

wage-earning (adjective)	working-class (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