pitting vs roughness

pitting and roughness both are nouns.

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

As nouns, pitting and roughness are synonyms defined as:

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

Other synonyms of pitting include indentation.

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