manual laborer vs working man

manual laborer and working man both are nouns.

Word	Noun	Adjective	Verb	Adverb
manual laborer	Yes	No	No	No
working man	Yes	No	No	No

As nouns, working man is a hypernym of manual laborer; that is, working man is a word with a broader meaning than manual laborer:

manual laborer: someone who works with their hands; someone engaged in manual labor
working man: an employee who performs manual or industrial labor

Other hypernyms of manual laborer include working person, workingman, workman.

manual laborer (noun)	working man (noun)
someone who works with their hands; someone engaged in manual labor	an employee who performs manual or industrial labor