sanguine vs redness

sanguine and redness both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanguine	Yes	Yes	No	No
redness	Yes	No	No	No

As nouns, redness is a hypernym of sanguine; that is, redness is a word with a broader meaning than sanguine:

sanguine: a blood-red color
redness: red color or pigment; the chromatic color resembling the hue of blood

Other hypernyms of sanguine include red.

sanguine (noun)	redness (noun)
chalk of a reddish-brown colour that resembles dried blood	red color or pigment; the chromatic color resembling the hue of blood
a blood-red color	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

sanguine (adjective)	redness (adjective)
inclined to a healthy reddish color often associated with outdoor life
confidently optimistic and cheerful