ward vs doer

ward and doer both are nouns.

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

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

Other hypernyms of ward include actor, worker.

ward (noun)	doer (noun)
block forming a division of a hospital (or a suite of rooms) shared by patients who need a similar kind of care	a person who acts and gets things done
a division of a prison (usually consisting of several cells)
a district into which a city or town is divided for the purpose of administration and elections
a person who is under the protection or in the custody of another

ward (verb)	doer (verb)
watch over or shield from danger or harm; protect