ileitis vs redness

ileitis and redness both are nouns.

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

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

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

Other hypernyms of ileitis include inflammation, rubor.

ileitis (noun)	redness (noun)
inflammation of the ileum	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