tarsitis vs redness

tarsitis and redness both are nouns.

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

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

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

Other hypernyms of tarsitis include inflammation, rubor.

tarsitis (noun)	redness (noun)
inflammation of the eyelid	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