smile vs smiler

smile and smiler both are nouns.

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

smile (noun)	smiler (noun)
a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement	the human face (`kisser' and `smiler' and `mug' are informal terms for `face' and `phiz' is British)
	a person who smiles

smile (verb)	smiler (verb)
change one's facial expression by spreading the lips, often to signal pleasure
express with a smile