mound vs cumulation

mound and cumulation both are nouns.

Word	Noun	Adjective	Verb	Adverb
mound	Yes	No	Yes	No
cumulation	Yes	No	No	No

As nouns, mound and cumulation are synonyms defined as:

Other synonyms of mound include agglomerate, cumulus, heap, pile.

mound (noun)	cumulation (noun)
the position on a baseball team of the player who throws the ball for a batter to try to hit	a collection of objects laid on top of each other
structure consisting of an artificial heap or bank usually of earth or stones
(baseball) the slight elevation on which the pitcher stands
a collection of objects laid on top of each other
a small natural hill

mound (verb)	cumulation (verb)
form into a rounded elevation