hill vs embankment

hill and embankment both are nouns.

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

As nouns, embankment is a hyponym of hill; that is, embankment 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
embankment: a long artificial mound of stone or earth; built to hold back water or to support a road or as protection

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

hill (noun)	embankment (noun)
(baseball) the slight elevation on which the pitcher stands	a long artificial mound of stone or earth; built to hold back water or to support a road or as protection
structure consisting of an artificial heap or bank usually of earth or stones
a local and well-defined elevation of the land

hill (verb)	embankment (verb)
form into a hill