mastitis vs rubor

mastitis and rubor both are nouns.

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

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

mastitis: inflammation of a breast (or udder)
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of mastitis include inflammation, redness.

mastitis (noun)	rubor (noun)
inflammation of a breast (or udder)	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat