adenitis vs redness

adenitis and redness both are nouns.

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

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

adenitis: inflammation of a gland or lymph node
redness: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of adenitis include inflammation, rubor.

adenitis (noun)	redness (noun)
inflammation of a gland or lymph node	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