cowman vs cattleman

cowman and cattleman both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowman	Yes	No	No	No
cattleman	Yes	No	No	No

As nouns, cowman and cattleman are synonyms defined as:

cowman and cattleman: a male hired hand who tends cattle and performs other duties on horseback

Other synonyms of cowman include cowboy.

cowman (noun)	cattleman (noun)
a male hired hand who tends cattle and performs other duties on horseback	a man who raises (or tends) cattle
	a male hired hand who tends cattle and performs other duties on horseback