smirk vs fleer

smirk and fleer both are nouns.

Word	Noun	Adjective	Verb	Adverb
smirk	Yes	No	Yes	No
fleer	Yes	No	Yes	No

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

smirk (noun)	fleer (noun)
a smile expressing smugness or scorn instead of pleasure	someone who flees from an uncongenial situation
	contempt expressed by mockery in looks or words

smirk (verb)	fleer (verb)
smile affectedly or derisively	to smirk contemptuously