orchitis vs rubor

orchitis and rubor both are nouns.

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

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

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

Other hypernyms of orchitis include inflammation, redness.

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