horse wrangler vs cowpoke

horse wrangler and cowpoke both are nouns.

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

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

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

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

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