jetty vs groyne

jetty and groyne both are nouns.

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

As nouns, jetty and groyne are synonyms defined as:

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

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

jetty (noun)	groyne (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