feistiness vs energy

feistiness and energy both are nouns.

Word	Noun	Adjective	Verb	Adverb
feistiness	Yes	No	No	No
energy	Yes	No	No	No

As nouns, energy is a hypernym of feistiness; that is, energy is a word with a broader meaning than feistiness:

Other hypernyms of feistiness include get-up-and-go, push, adventurousness, venturesomeness.

feistiness (noun)	energy (noun)
The quality or state of being tenacious, energetic, spunky.	forceful exertion
	an imaginative lively style (especially style of writing)
	enterprising or ambitious drive
	(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
	any source of usable power
	a healthy capacity for vigorous activity