tenableness vs plausibility

tenableness and plausibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
tenableness	Yes	No	No	No
plausibility	Yes	No	No	No

As nouns, plausibility is a hypernym of tenableness; that is, plausibility is a word with a broader meaning than tenableness:

tenableness: the quality of being plausible or acceptable to a reasonable person
plausibility: apparent validity

Other hypernyms of tenableness include plausibleness.

tenableness (noun)	plausibility (noun)
the quality of being plausible or acceptable to a reasonable person	apparent validity