#mountainside__versant  the side or slope of a mountain; "conifer forests cover the eastern versant"
  supertype:  incline__side  an elevated geological formation; "he climbed the steep slope"; "the house was built on the side of the mountain"
  part of:  mountain__mount  a land mass that projects well above its surroundings; higher than a hill

No statement uses or specializes mountainside; click here to add one.