parotitis vs rubor

parotitis and rubor both are nouns.

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

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

parotitis: inflammation of one or both parotid glands
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of parotitis include inflammation, redness.

parotitis (noun)	rubor (noun)
inflammation of one or both parotid glands	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat