mastoiditis vs rubor

mastoiditis and rubor both are nouns.

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

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

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

Other hypernyms of mastoiditis include inflammation, redness.

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