coarseness vs roughness

coarseness and roughness both are nouns.

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

As nouns, roughness is a hypernym of coarseness; that is, roughness is a word with a broader meaning than coarseness:

coarseness: looseness or roughness in texture (as of cloth)
roughness: a texture of a surface or edge that is not smooth but is irregular and uneven

Other hypernyms of coarseness include raggedness.

As nouns, roughness is a hypernym of coarseness; that is, roughness is a word with a broader meaning than coarseness:

coarseness: the quality of being composed of relatively large particles
roughness: a texture of a surface or edge that is not smooth but is irregular and uneven

Other hypernyms of coarseness include raggedness.

coarseness (noun)	roughness (noun)
looseness or roughness in texture (as of cloth)	harsh or severe speech or behavior
the quality of being composed of relatively large particles	a texture of a surface or edge that is not smooth but is irregular and uneven
the quality of lacking taste and refinement	the quality of being harsh or rough or grating to the senses
language or humor that is down-to-earth	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