splenitis vs redness

splenitis and redness both are nouns.

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

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

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

Other hypernyms of splenitis include inflammation, rubor.

splenitis (noun)	redness (noun)
inflammation of the spleen	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