fibromyositis vs redness

fibromyositis and redness both are nouns.

Word	Noun	Adjective	Verb	Adverb
fibromyositis	Yes	No	No	No
redness	Yes	No	No	No

As nouns, redness is a hypernym of fibromyositis; that is, redness is a word with a broader meaning than fibromyositis:

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

Other hypernyms of fibromyositis include inflammation, rubor.

fibromyositis (noun)	redness (noun)
local inflammation of muscle and connective tissue	red color or pigment; the chromatic color resembling the hue of blood
	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat