twitter vs peep

twitter and peep both are nouns.

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

As verbs, peep is a hypernym of twitter; that is, peep is a word with a broader meaning than twitter:

Other hypernyms of twitter include cheep, chirp, chirrup.

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

twitter (verb)	peep (verb)
make high-pitched sounds, as of birds	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