peep vs chirrup

peep and chirrup both are nouns.

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

As verbs, peep and chirrup are synonyms defined as:

Other synonyms of peep include cheep, chirp.

peep (noun)	chirrup (noun)
a secret look	a series of chirps
the short weak cry of a young bird

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