smiler vs doer

smiler and doer both are nouns.

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

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

Other hypernyms of smiler include actor, worker.

smiler (noun)	doer (noun)
the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)	a person who acts and gets things done
a person who smiles