mule skinner vs mule driver

mule skinner and mule driver both are nouns.

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

As nouns, mule skinner and mule driver are synonyms defined as:

Other synonyms of mule skinner include muleteer, skinner.

mule skinner (noun)	mule driver (noun)
a worker who drives mules	a worker who drives mules