Cheviot Hills vs Cheviots

Cheviot Hills and Cheviots both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cheviot Hills	Yes	No	No	No
Cheviots	Yes	No	No	No

As nouns, Cheviot Hills and Cheviots are synonyms defined as:

Cheviot Hills and Cheviots: a range of hills on the border between England and Scotland

Cheviot Hills (noun)	Cheviots (noun)
a range of hills on the border between England and Scotland	a range of hills on the border between England and Scotland