stealth fighter vs fighter

stealth fighter and fighter both are nouns.

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

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

stealth fighter: a fighter that is difficult to detect by radar; is built for precise targeting and uses laser-guided bombs
fighter: a high-speed military or naval airplane designed to destroy enemy aircraft in the air

Other hypernyms of stealth fighter include attack aircraft, fighter aircraft, stealth aircraft.

stealth fighter (noun)	fighter (noun)
a fighter that is difficult to detect by radar; is built for precise targeting and uses laser-guided bombs	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