voider vs doer

voider and doer both are nouns.

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

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

Other hypernyms of voider include actor, worker.

voider (noun)	doer (noun)
a hamper that holds dirty clothes to be washed or wet clothes to be dried	a person who acts and gets things done
a piece of chain mail covering a place unprotected by armor plate
an official who can invalidate or nullify
a person who defecates