pneumonitis vs rubor

pneumonitis and rubor both are nouns.

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

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

pneumonitis: inflammation of the lungs; caused by a virus or an allergic reaction
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of pneumonitis include inflammation, redness.

pneumonitis (noun)	rubor (noun)
inflammation of the lungs; caused by a virus or an allergic reaction	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat