puncher vs cowman

puncher and cowman both are nouns.

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

As nouns, cowman is a hyponym of puncher; that is, cowman is a word with a more specific, narrower meaning than puncher:

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

Other hyponyms of puncher include buckaroo, buckeroo, vaquero, cowgirl, gaucho, horse wrangler, wrangler, roper, cattleman, cowboy.

puncher (noun)	cowman (noun)
a tool for making holes or indentations	a male hired hand who tends cattle and performs other duties on horseback
a hired hand who tends cattle and performs other duties on horseback
someone who delivers punches