mound vs cumulus

mound and cumulus both are nouns.

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

As nouns, mound and cumulus are synonyms defined as:

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

mound (noun)	cumulus (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	a globular cloud
(baseball) the slight elevation on which the pitcher stands
a collection of objects laid on top of each other
a small natural hill

mound (adjective)	cumulus (adjective)
	of or related to cumulous clouds

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