gastritis vs rubor

gastritis and rubor both are nouns.

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

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

gastritis: inflammation of the lining of the stomach; nausea and loss of appetite and discomfort after eating
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of gastritis include inflammation, redness.

gastritis (noun)	rubor (noun)
inflammation of the lining of the stomach; nausea and loss of appetite and discomfort after eating	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat