puncher vs cowpuncher

puncher and cowpuncher both are nouns.

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

As nouns, puncher and cowpuncher are synonyms defined as:

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

Other synonyms of puncher include cowhand, cowherd, cowpoke.

puncher (noun)	cowpuncher (noun)
a tool for making holes or indentations	a 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