seeker vs doer

seeker and doer both are nouns.

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

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

Other hypernyms of seeker include actor, worker.

seeker (noun)	doer (noun)
a missile equipped with a device that is attracted toward some kind of emission (heat or light or sound or radio waves)	a person who acts and gets things done
someone making a search or inquiry