Dall's sheep vs white sheep

Dall's sheep and white sheep both are nouns.

Word	Noun	Adjective	Verb	Adverb
Dall's sheep	Yes	No	No	No
white sheep	Yes	No	No	No

As nouns, Dall's sheep and white sheep are synonyms defined as:

Dall's sheep and white sheep: large white wild sheep of northwestern Canada and Alaska

Other synonyms of Dall's sheep include Dall sheep, Ovis montana dalli.

Dall's sheep (noun)	white sheep (noun)
large white wild sheep of northwestern Canada and Alaska	large white wild sheep of northwestern Canada and Alaska