sheep vs wether

sheep and wether both are nouns.

Word	Noun	Adjective	Verb	Adverb
sheep	Yes	No	No	No
wether	Yes	No	No	No

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

Other hyponyms of sheep include ewe, ram, tup, black sheep, domestic sheep, Ovis aries.

sheep (noun)	wether (noun)
woolly usually horned ruminant mammal related to the goat	male sheep especially a castrated one
a docile and vulnerable person who would rather follow than make an independent decision
a timid defenseless simpleton who is readily preyed upon