Hillier is the comparative form of hilly. Hilliest is the superlative form.
The Pennines.
Nepal is known for having some of the hilliest terrain in the world, with the Himalayas, including Mount Everest, dominating much of the country's landscape.
hilliest
Winnipeg
The abbreviation for New York City is NYC.
The Hilliest state turns out to be Hawaii .
New York City (NY, NY)
Duluth, MN #1San Francisco, CA #2Fitchburg,MA #3Read more: What_are_the_hilliest_cities_in_the_US
ny,ny
Albany, NY
Johnson City, NY, is in area code 607.