knoll vs mound

knoll and mound both are nouns.

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

As nouns, knoll and mound are synonyms defined as:

Other synonyms of knoll include hammock, hillock, hummock.

knoll (noun)	mound (noun)
a small natural hill	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

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