mule skinner vs laborer

mule skinner and laborer both are nouns.

Word	Noun	Adjective	Verb	Adverb
mule skinner	Yes	No	No	No
laborer	Yes	No	No	No

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

mule skinner: a worker who drives mules
laborer: someone who works with their hands; someone engaged in manual labor

Other hypernyms of mule skinner include jack, labourer, manual laborer.

mule skinner (noun)	laborer (noun)
a worker who drives mules	someone who works with their hands; someone engaged in manual labor