embankment vs rampart

embankment and rampart both are nouns.

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

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

embankment: a long artificial mound of stone or earth; built to hold back water or to support a road or as protection
rampart: an embankment built around a space for defensive purposes

Other hyponyms of embankment include levee, bulwark, wall.

embankment (noun)	rampart (noun)
a long artificial mound of stone or earth; built to hold back water or to support a road or as protection	an embankment built around a space for defensive purposes