keratitis vs rubor

keratitis and rubor both are nouns.

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

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

keratitis: inflammation of the cornea causing watery painful eyes and blurred vision
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of keratitis include inflammation, redness.

keratitis (noun)	rubor (noun)
inflammation of the cornea causing watery painful eyes and blurred vision	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat