aortitis vs redness

aortitis and redness both are nouns.

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

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

aortitis: inflammation of the aorta
redness: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of aortitis include inflammation, rubor.

aortitis (noun)	redness (noun)
inflammation of the aorta	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