hill vs barbette

hill and barbette both are nouns.

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

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

hill: 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 hill include barrow, burial mound, grave mound, tumulus, embankment, snow bank, snowbank.

hill (noun)	barbette (noun)
(baseball) the slight elevation on which the pitcher stands	(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
a local and well-defined elevation of the land

hill (verb)	barbette (verb)
form into a hill