reasonableness vs sanity

reasonableness and sanity both are nouns.

Word	Noun	Adjective	Verb	Adverb
reasonableness	Yes	No	No	No
sanity	Yes	No	No	No

As nouns, sanity is a hypernym of reasonableness; that is, sanity is a word with a broader meaning than reasonableness:

Other hypernyms of reasonableness include saneness.

reasonableness (noun)	sanity (noun)
goodness of reason and judgment	normal or sound powers of mind
moderation in expectations
the property of being moderate in price or expenditures
the quality of being plausible or acceptable to a reasonable person
the state of having good sense and sound judgment