cowman vs cowhand

cowman and cowhand both are nouns.

Word	Noun	Adjective	Verb	Adverb
cowman	Yes	No	No	No
cowhand	Yes	No	No	No

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

cowman: a male hired hand who tends cattle and performs other duties on horseback
cowhand: a hired hand who tends cattle and performs other duties on horseback

Other hypernyms of cowman include cowherd, cowpoke, cowpuncher, puncher, adult male, man.

cowman (noun)	cowhand (noun)
a male hired hand who tends cattle and performs other duties on horseback	a hired hand who tends cattle and performs other duties on horseback