look vs leer

look and leer both are nouns.

Word	Noun	Adjective	Verb	Adverb
look	Yes	No	Yes	No
leer	Yes	No	Yes	No

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

Other hyponyms of look include light, spark, sparkle, twinkle, gloominess.

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

look: perceive with attention; direct one's gaze towards; look
leer: look suggestively or obliquely; look or gaze with a sly, immodest, or malign expression

look (noun)	leer (noun)
the act of directing the eyes toward something and perceiving it visually; look	a suggestive or sneering look or grin
physical appearance	a facial expression of contempt or scorn; the upper lip curls
the feelings expressed on a person's face
the general atmosphere of a place or situation and the effect that it has on people

look (verb)	leer (verb)
to physically appear a certain way to another individual or group	look suggestively or obliquely; look or gaze with a sly, immodest, or malign expression
look forward to the probable occurrence of
have faith or confidence in
convey by one's expression
perceive with attention; direct one's gaze towards; look
give a certain impression of being something or having a certain aspect
search or seek
take charge of or deal with
be oriented in a certain direction, often with respect to another reference point; be opposite to
accord in appearance with