wrangler vs cowpuncher

wrangler and cowpuncher both are nouns.

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

As nouns, cowpuncher is a hypernym of wrangler; that is, cowpuncher is a word with a broader meaning than wrangler:

wrangler: a cowboy who takes care of the saddle horses
cowpuncher: a hired hand who tends cattle and performs other duties on horseback

Other hypernyms of wrangler include cowhand, cowherd, cowpoke, puncher.

wrangler (noun)	cowpuncher (noun)
a cowboy who takes care of the saddle horses	a hired hand who tends cattle and performs other duties on horseback
someone who argues noisily or angrily