smoothness vs graciousness

smoothness and graciousness both are nouns.

Word	Noun	Adjective	Verb	Adverb
smoothness	Yes	No	No	No
graciousness	Yes	No	No	No

As nouns, graciousness is a hypernym of smoothness; that is, graciousness is a word with a broader meaning than smoothness:

smoothness: the quality of being bland and gracious or ingratiating in manner
graciousness: excellence of manners or social conduct

smoothness (noun)	graciousness (noun)
a texture without roughness; smooth to the touch	excellence of manners or social conduct
the quality of having a level and even surface	the quality of being kind and gentle
the quality of being free from errors or interruptions
the quality of being bland and gracious or ingratiating in manner
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