mound vs barbette

mound and barbette both are nouns.

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

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

mound: structure consisting of an artificial heap or bank usually of earth or stones
barbette: (formerly) a mound of earth inside a fort from which heavy gun can be fired over the parapet

Other hyponyms of mound include barrow, burial mound, grave mound, tumulus, embankment, snow bank, snowbank.

mound (noun)	barbette (noun)
the position on a baseball team of the player who throws the ball for a batter to try to hit	(formerly) a mound of earth inside a fort from which heavy gun can be fired over the parapet
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)	barbette (verb)
form into a rounded elevation