sanguine vs ruddy

sanguine is a noun but ruddy is not a noun.

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

As adjectives, sanguine and ruddy are synonyms defined as:

sanguine and ruddy: inclined to a healthy reddish color often associated with outdoor life

Other synonyms of sanguine include florid, rubicund.

sanguine (noun)	ruddy (noun)
chalk of a reddish-brown colour that resembles dried blood
a blood-red color

sanguine (adjective)	ruddy (adjective)
inclined to a healthy reddish color often associated with outdoor life	of a color at the end of the color spectrum (next to orange); resembling the color of blood or cherries or tomatoes or rubies
confidently optimistic and cheerful	inclined to a healthy reddish color often associated with outdoor life