mound vs mound over

mound is a noun but mound over is not a noun.

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

As verbs, mound over is a hyponym of mound; that is, mound over is a word with a more specific, narrower meaning than mound:

mound (noun)	mound over (noun)
the position on a baseball team of the player who throws the ball for a batter to try to hit
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)	mound over (verb)
form into a rounded elevation	form mounds over
	form a mound over