1) Appalachian mountains 2) Chain 3) Chain of mountains 4) Mountain chain 5) Mountain range 6) Range 7) Range of mountains 8) State names mountain range 
[n] - a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico
Appalachian Mountains noun a mountain range in the eastern United States extending from Quebec to the Gulf of Mexico; a historic barrier to early westward expansion of the United States