section hand vs manual laborer

section hand and manual laborer both are nouns.

Word	Noun	Adjective	Verb	Adverb
section hand	Yes	No	No	No
manual laborer	Yes	No	No	No

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

section hand: a laborer assigned to a section gang
manual laborer: someone who works with their hands; someone engaged in manual labor

Other hypernyms of section hand include jack, laborer, labourer.

section hand (noun)	manual laborer (noun)
a laborer assigned to a section gang	someone who works with their hands; someone engaged in manual labor