tautness vs tenseness

tautness and tenseness both are nouns.

Word	Noun	Adjective	Verb	Adverb
tautness	Yes	No	No	No
tenseness	Yes	No	No	No

As nouns, tautness and tenseness are synonyms defined as:

tautness and tenseness: the physical condition of being stretched or strained

Other synonyms of tautness include tension, tensity.

tautness (noun)	tenseness (noun)
lack of movement or room for movement	the physical condition of being stretched or strained
the physical condition of being stretched or strained	(psychology) a state of mental or emotional strain or suspense