wage earner vs earner

wage earner and earner both are nouns.

Word	Noun	Adjective	Verb	Adverb
wage earner	Yes	No	No	No
earner	Yes	No	No	No

As nouns, wage earner and earner are synonyms defined as:

wage earner and earner: someone who earn wages in return for their labor

wage earner (noun)	earner (noun)
someone who earn wages in return for their labor	someone who earn wages in return for their labor