Pennine Chain vs Pennines

Pennine Chain and Pennines both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pennine Chain	Yes	No	No	No
Pennines	Yes	No	No	No

As nouns, Pennine Chain and Pennines are synonyms defined as:

Pennine Chain and Pennines: a system of hills in Britain that extend from the Scottish border in the north to the Trent River in the south; forms the watershed for English rivers

Pennine Chain (noun)	Pennines (noun)
a system of hills in Britain that extend from the Scottish border in the north to the Trent River in the south; forms the watershed for English rivers	a system of hills in Britain that extend from the Scottish border in the north to the Trent River in the south; forms the watershed for English rivers