conjunctivitis vs inflammation

conjunctivitis and inflammation both are nouns.

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

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

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

Other hypernyms of conjunctivitis include redness, rubor.

conjunctivitis (noun)	inflammation (noun)
inflammation of the conjunctiva of the eye	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