domestic sheep vs sheep

domestic sheep and sheep both are nouns.

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

As nouns, sheep is a hypernym of domestic sheep; that is, sheep is a word with a broader meaning than domestic sheep:

domestic sheep: any of various breeds raised for wool or edible meat or skin
sheep: woolly usually horned ruminant mammal related to the goat

domestic sheep (noun)	sheep (noun)
any of various breeds raised for wool or edible meat or skin	woolly usually horned ruminant mammal related to the goat
	a docile and vulnerable person who would rather follow than make an independent decision
	a timid defenseless simpleton who is readily preyed upon