myositis vs rubor

myositis and rubor both are nouns.

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

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

myositis: inflammation of muscle tissue
rubor: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of myositis include inflammation, redness.

myositis (noun)	rubor (noun)
inflammation of muscle tissue	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat