charger vs warhorse

charger and warhorse both are nouns.

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

As nouns, warhorse is a hypernym of charger; that is, warhorse is a word with a broader meaning than charger:

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