iritis vs inflammation

iritis and inflammation both are nouns.

Word	Noun	Adjective	Verb	Adverb
iritis	Yes	No	No	No
inflammation	Yes	No	No	No

As nouns, inflammation is a hypernym of iritis; that is, inflammation is a word with a broader meaning than iritis:

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

Other hypernyms of iritis include redness, rubor.

iritis (noun)	inflammation (noun)
inflammation of the iris	arousal to violent emotion
	the act of setting something on fire
	a response of body tissues to injury or irritation; characterized by pain and swelling and redness and heat
	the state of being emotionally aroused and worked up