cow man vs cattleman

cow man and cattleman both are nouns.

Word	Noun	Adjective	Verb	Adverb
cow man	Yes	No	No	No
cattleman	Yes	No	No	No

As nouns, cow man and cattleman are synonyms defined as:

Other synonyms of cow man include beef man.

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