hill vs pitcher's mound

hill and pitcher's mound both are nouns.

Word	Noun	Adjective	Verb	Adverb
hill	Yes	No	Yes	No
pitcher's mound	Yes	No	No	No

As nouns, hill and pitcher's mound are synonyms defined as:

hill and pitcher's mound: (baseball) the slight elevation on which the pitcher stands

Other synonyms of hill include mound.

hill (noun)	pitcher's mound (noun)
(baseball) the slight elevation on which the pitcher stands	(baseball) the slight elevation on which the pitcher stands
structure consisting of an artificial heap or bank usually of earth or stones
a local and well-defined elevation of the land

hill (verb)	pitcher's mound (verb)
form into a hill