skirmisher vs fighter

skirmisher and fighter both are nouns.

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

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

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

skirmisher (noun)	fighter (noun)
someone who skirmishes (e.g., as a member of a scouting party)	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