smoothness vs suavity

smoothness and suavity both are nouns.

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

As nouns, smoothness and suavity are synonyms defined as:

smoothness and suavity: the quality of being bland and gracious or ingratiating in manner

Other synonyms of smoothness include blandness, suaveness.

smoothness (noun)	suavity (noun)
a texture without roughness; smooth to the touch	the quality of being bland and gracious or ingratiating in manner
the quality of having a level and even surface
the quality of being free from errors or interruptions
the quality of being bland and gracious or ingratiating in manner
powerful and effective language