jetty vs breakwater

jetty and breakwater both are nouns.

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

As nouns, jetty and breakwater are synonyms defined as:

jetty and breakwater: 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 bulwark, groin, groyne, mole, seawall.

jetty (noun)	breakwater (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