bailey vs rampart

bailey and rampart both are nouns.

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

As nouns, rampart is a hypernym of bailey; that is, rampart is a word with a broader meaning than bailey:

bailey: the outer defensive wall that surrounds the outer courtyard of a castle
rampart: an embankment built around a space for defensive purposes

Other hypernyms of bailey include bulwark, wall.

bailey (noun)	rampart (noun)
the outer defensive wall that surrounds the outer courtyard of a castle	an embankment built around a space for defensive purposes
the outer courtyard of a castle