gamecock vs fighter

gamecock and fighter both are nouns.

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

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

Other hypernyms of gamecock include battler, belligerent, combatant, scrapper.

gamecock (noun)	fighter (noun)
a cock bred and trained for fighting	a high-speed military or naval airplane designed to destroy enemy aircraft in the air
someone who is a very fierce fighter	someone who fights (or is fighting)
	someone who fights for a cause