groyne vs bulwark

groyne and bulwark both are nouns.

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

As nouns, groyne and bulwark are synonyms defined as:

groyne and bulwark: a protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away

Other synonyms of groyne include breakwater, groin, jetty, mole, seawall.

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

groyne (verb)	bulwark (verb)
	defend with a bulwark