hitting average vs batting average

hitting average and batting average both are nouns.

Word	Noun	Adjective	Verb	Adverb
hitting average	Yes	No	No	No
batting average	Yes	No	No	No

As nouns, hitting average and batting average are synonyms defined as:

hitting average and batting average: (baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat

hitting average (noun)	batting average (noun)
(baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat	(baseball) a measure of a batter's performance; the number of base hits divided by the number of official times at bat
	(an extension of the baseball term) the proportion of times some effort succeeds