uveitis vs redness

uveitis and redness both are nouns.

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

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

uveitis: inflammation of the uvea of the eye
redness: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of uveitis include inflammation, rubor.

uveitis (noun)	redness (noun)
inflammation of the uvea of the eye	red color or pigment; the chromatic color resembling the hue of blood
	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat