retinitis vs rubor

retinitis and rubor both are nouns.

Word	Noun	Adjective	Verb	Adverb
retinitis	Yes	No	No	No
rubor	Yes	No	No	No

As nouns, rubor is a hypernym of retinitis; that is, rubor is a word with a broader meaning than retinitis:

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

Other hypernyms of retinitis include inflammation, redness.

retinitis (noun)	rubor (noun)
inflammation of the retina	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat