spitter vs doer

spitter and doer both are nouns.

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

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

Other hypernyms of spitter include actor, worker.

spitter (noun)	doer (noun)
an illegal pitch in which a foreign substance (spit or Vaseline) is applied to the ball by the pitcher before he throws it	a person who acts and gets things done
a person who spits (ejects saliva or phlegm from the mouth)