breakwater vs jetty

breakwater and jetty both are nouns.

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

As nouns, breakwater and jetty are synonyms defined as:

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

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

breakwater (noun)	jetty (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