Princeton's WordNet

1. hill(noun)

   a local and well-defined elevation of the land

   Synonyms:
   pitcher's mound, mound

2. mound, hill(noun)

   structure consisting of an artificial heap or bank usually of earth or stones

   Synonyms:
   hillock, heap, hill, cumulation, agglomerate, pile, pitcher's mound, pitcher, cumulus, hammock, knoll, hummock, mound

3. Hill, J. J. Hill, James Jerome Hill(noun)

   United States railroad tycoon (1838-1916)

   Synonyms:
   pitcher's mound, mound

4. Hill, Benny Hill, Alfred Hawthorne(noun)

   risque English comedian (1925-1992)

   Synonyms:
   pitcher's mound, mound

5. mound, hill, pitcher's mound(verb)

   (baseball) the slight elevation on which the pitcher stands

   Synonyms:
   hillock, heap, hill, cumulation, agglomerate, pile, pitcher's mound, pitcher, cumulus, hammock, knoll, hummock, mound

6. hill(verb)

   form into a hill