earner vs wage earner

earner and wage earner both are nouns.

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

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

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

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