shepherd vs drover

shepherd and drover both are nouns.

Word	Noun	Adjective	Verb	Adverb
shepherd	Yes	No	Yes	No
drover	Yes	No	No	No

As nouns, drover is a hypernym of shepherd; that is, drover is a word with a broader meaning than shepherd:

shepherd: a herder of sheep (on an open range); someone who keeps the sheep together in a flock
drover: someone who drives a herd

Other hypernyms of shepherd include herder, herdsman.

shepherd (noun)	drover (noun)
a herder of sheep (on an open range); someone who keeps the sheep together in a flock	someone who drives a herd
a clergyman who watches over a group of people

shepherd (verb)	drover (verb)
tend as a shepherd, as of sheep or goats
watch over like a shepherd, as a teacher of her pupils