smile vs simper

smile and simper both are nouns.

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

As nouns, simper is a hyponym of smile; that is, simper is a word with a more specific, narrower meaning than smile:

smile: a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement
simper: a silly self-conscious smile

Other hyponyms of smile include smirk.

As verbs, simper is a hyponym of smile; that is, simper is a word with a more specific, narrower meaning than smile:

smile: change one's facial expression by spreading the lips, often to signal pleasure
simper: smile affectedly or derisively

Other hyponyms of smile include dimple, grin, beam, smirk, sneer.

smile (noun)	simper (noun)
a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement	a silly self-conscious smile

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