alleghenies

(noun) the western part of the Appalachian Mountains; extending from northern Pennsylvania to southwestern Virginia. Synonyms: Alleghenies, Allegheny Mountains.

(noun) a river that rises in Pennsylvania and flows north into New York and then back south through Pennsylvania again to join the Monongahela River at Pittsburgh which is the beginning of the Ohio River. Synonyms: Allegheny, Allegheny River.