rhinitis vs redness

rhinitis and redness both are nouns.

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

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

rhinitis: an inflammation of the mucous membrane lining the nose (usually associated with nasal discharge)
redness: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of rhinitis include inflammation, rubor.

rhinitis (noun)	redness (noun)
an inflammation of the mucous membrane lining the nose (usually associated with nasal discharge)	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