viscidity vs viscidness

viscidity and viscidness both are nouns.

Word	Noun	Adjective	Verb	Adverb
viscidity	Yes	No	No	No
viscidness	Yes	No	No	No

As nouns, viscidity and viscidness are synonyms defined as:

Other synonyms of viscidity include cohesiveness, glueyness, gluiness, gumminess, ropiness, tackiness.

viscidity (noun)	viscidness (noun)
the property of being cohesive and sticky	the property of being cohesive and sticky