bracero vs manual laborer

bracero and manual laborer both are nouns.

Word	Noun	Adjective	Verb	Adverb
bracero	Yes	No	No	No
manual laborer	Yes	No	No	No

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

bracero: a Mexican laborer who worked in the United States on farms and railroads in order to ease labor shortages during World War II
manual laborer: someone who works with their hands; someone engaged in manual labor

Other hypernyms of bracero include jack, laborer, labourer.

bracero (noun)	manual laborer (noun)
a Mexican laborer who worked in the United States on farms and railroads in order to ease labor shortages during World War II	someone who works with their hands; someone engaged in manual labor