peep vs looking at

peep and looking at both are nouns.

Word	Noun	Adjective	Verb	Adverb
peep	Yes	No	Yes	No
looking at	Yes	No	No	No

As nouns, looking at is a hypernym of peep; that is, looking at is a word with a broader meaning than peep:

peep: a secret look
looking at: the act of directing the eyes toward something and perceiving it visually; look

Other hypernyms of peep include look, looking.

peep (noun)	looking at (noun)
a secret look	the act of directing the eyes toward something and perceiving it visually; look
the short weak cry of a young bird

peep (verb)	looking at (verb)
appear as though from hiding
make high-pitched sounds
speak in a hesitant and high-pitched tone of voice
look furtively
cause to come into view