cattleman vs cowpoke

cattleman and cowpoke both are nouns.

Word	Noun	Adjective	Verb	Adverb
cattleman	Yes	No	No	No
cowpoke	Yes	No	No	No

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

cattleman: a male hired hand who tends cattle and performs other duties on horseback
cowpoke: a hired hand who tends cattle and performs other duties on horseback

Other hypernyms of cattleman include cowhand, cowherd, cowpuncher, puncher, adult male, man.

cattleman (noun)	cowpoke (noun)
a man who raises (or tends) cattle	a hired hand who tends cattle and performs other duties on horseback
a male hired hand who tends cattle and performs other duties on horseback