sinusitis vs redness

sinusitis and redness both are nouns.

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

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

sinusitis: inflammation of one of the paranasal sinuses
redness: a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat

Other hypernyms of sinusitis include inflammation, rubor.

sinusitis (noun)	redness (noun)
inflammation of one of the paranasal sinuses	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