peep vs chirp

peep and chirp both are nouns.

Word	Noun	Adjective	Verb	Adverb
peep	Yes	No	Yes	No
chirp	Yes	No	Yes	No

As verbs, peep and chirp are synonyms defined as:

Other synonyms of peep include cheep, chirrup.

peep (noun)	chirp (noun)
a secret look	a sharp sound made by small birds or insects
the short weak cry of a young bird

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