energizer vs doer

energizer and doer both are nouns.

Word	Noun	Adjective	Verb	Adverb
energizer	Yes	No	No	No
doer	Yes	No	No	No

As nouns, doer is a hypernym of energizer; that is, doer is a word with a broader meaning than energizer:

energizer: someone who imparts energy and vitality and spirit to other people
doer: a person who acts and gets things done

Other hypernyms of energizer include actor, worker.

energizer (noun)	doer (noun)
a device that supplies electrical energy	a person who acts and gets things done
someone who imparts energy and vitality and spirit to other people