horse wrangler vs cowhand

horse wrangler and cowhand both are nouns.

Word	Noun	Adjective	Verb	Adverb
horse wrangler	Yes	No	No	No
cowhand	Yes	No	No	No

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

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

Other hypernyms of horse wrangler include cowherd, cowpoke, cowpuncher, puncher.

horse wrangler (noun)	cowhand (noun)
a cowboy who takes care of the saddle horses	a hired hand who tends cattle and performs other duties on horseback