tenseness vs tautness

tenseness and tautness both are nouns.

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

As nouns, tenseness and tautness are synonyms defined as:

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

Other synonyms of tenseness include tension, tensity.

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