terror vs doer

terror and doer both are nouns.

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

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

Other hypernyms of terror include actor, worker.

terror (noun)	doer (noun)
the use of extreme fear in order to coerce people (especially for political reasons)	a person who acts and gets things done
an overwhelming feeling of fear and anxiety
a very troublesome child
a person who inspires fear or dread