warhorse vs charger

warhorse and charger both are nouns.

Word	Noun	Adjective	Verb	Adverb
warhorse	Yes	No	No	No
charger	Yes	No	No	No

As nouns, charger is a hyponym of warhorse; that is, charger is a word with a more specific, narrower meaning than warhorse:

Other hyponyms of warhorse include cavalry horse, courser, steed.

warhorse (noun)	charger (noun)
horse used in war	formerly a strong swift horse ridden into battle
a work of art (composition or drama) that is part of the standard repertory but has become hackneyed from much repetition	a device that can hold a rechargeable battery by means of an electrical cable
an experienced person who has been through many battles; someone who has given long service