episcleritis vs rubor

episcleritis and rubor both are nouns.

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

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

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

Other hypernyms of episcleritis include inflammation, redness.

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