bailey vs bulwark

bailey and bulwark both are nouns.

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

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

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

Other hypernyms of bailey include rampart, wall.

bailey (noun)	bulwark (noun)
the outer defensive wall that surrounds the outer courtyard of a castle	a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away
the outer courtyard of a castle	an embankment built around a space for defensive purposes
	a fencelike structure around a deck

bailey (verb)	bulwark (verb)
	defend with a bulwark