sheepman vs shepherdess

sheepman and shepherdess both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheepman	Yes	No	No	No
shepherdess	Yes	No	No	No

As nouns, shepherdess is a hyponym of sheepman; that is, shepherdess is a word with a more specific, narrower meaning than sheepman:

sheepman: a herder of sheep (on an open range); someone who keeps the sheep together in a flock
shepherdess: a woman shepherd

sheepman (noun)	shepherdess (noun)
a man who raises (or tends) sheep	a woman shepherd
a herder of sheep (on an open range); someone who keeps the sheep together in a flock