roughness vs pitting

roughness and pitting both are nouns.

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

As nouns, roughness and pitting are synonyms defined as:

roughness and pitting: the formation of small pits in a surface as a consequence of corrosion

Other synonyms of roughness include indentation.

roughness (noun)	pitting (noun)
harsh or severe speech or behavior	the formation of small pits in a surface as a consequence of corrosion
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