interceptor vs fighter

interceptor and fighter both are nouns.

Word	Noun	Adjective	Verb	Adverb
interceptor	Yes	No	No	No
fighter	Yes	No	No	No

As nouns, fighter is a hypernym of interceptor; that is, fighter is a word with a broader meaning than interceptor:

interceptor: a fast maneuverable fighter plane designed to intercept enemy aircraft
fighter: a high-speed military or naval airplane designed to destroy enemy aircraft in the air

Other hypernyms of interceptor include attack aircraft, fighter aircraft.

interceptor (noun)	fighter (noun)
a fast maneuverable fighter plane designed to intercept enemy aircraft	a high-speed military or naval airplane designed to destroy enemy aircraft in the air
	someone who fights (or is fighting)
	someone who fights for a cause