sanguinity vs sanguineness

sanguinity and sanguineness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanguinity	Yes	No	No	No
sanguineness	Yes	No	No	No

As nouns, sanguinity and sanguineness are synonyms defined as:

sanguinity and sanguineness: feeling sanguine; optimistically cheerful and confident

sanguinity (noun)	sanguineness (noun)
feeling sanguine; optimistically cheerful and confident	feeling sanguine; optimistically cheerful and confident