roughness vs choppiness

roughness and choppiness both are nouns.

Word	Noun	Adjective	Verb	Adverb
roughness	Yes	No	No	No
choppiness	Yes	No	No	No

As nouns, roughness and choppiness are synonyms defined as:

roughness and choppiness: used of the sea during inclement or stormy weather

Other synonyms of roughness include rough water.

roughness (noun)	choppiness (noun)
harsh or severe speech or behavior	used of the sea during inclement or stormy weather
a texture of a surface or edge that is not smooth but is irregular and uneven
the quality of being harsh or rough or grating to the senses
an unpolished unrefined quality
the formation of small pits in a surface as a consequence of corrosion
used of the sea during inclement or stormy weather
rowdy behavior