Synonyms for Chirp:

n.

declaim, frame, declare, phrase, chorus, mouth, put, gasp out, pant. chirp (noun)
tweedle, chirrup, cheep, twirp.
chirrup (noun)
lilt, purl, pipe, sound, chip, quaver, tweet, twitter, roll.
ululation (noun)
cuckoo, quack, coo, moo, snarl, warble, bleat, bellow, cluck, bray, call, ululation, whinny, meow, caw, gobble, cackle, cry, howl, squawk, honk, chatter, purr, bark, neigh, yelp, roar, trill, bawl, snort, grunt, bay, twit, squeal, growl, hoot, mew, crow.

v.

peep, cheep (verb)
chip, lilt, chirrup, quaver, warble, roll, call, tweedle, pipe, tweet, purl, trill, twitter, sound.
ululate (verb)
cuckoo, quack, coo, moo, snarl, warble, bleat, bellow, cluck, bray, call, ululate, whinny, meow, caw, gobble, cackle, cry, howl, squawk, honk, chatter, purr, bark, neigh, yelp, roar, trill, bawl, snort, grunt, bay, twit, squeal, growl, hoot, mew, crow.

Other synonyms:

gasp out, declaim. pant. declare. phrase. chorus. mouth. put. frame. cheep
tweedle, chirrup.
peep
tweet.
sing
twitter.
Other relevant words:
frame, declare, declaim, pant, tweet, chip, cheep, twitter, twirp, tweedle, pipe, sound, roll, quaver, lilt, put, chorus, phrase, mouth, chirrup, purl.

Usage examples for chirp

  1. Twilight here is of short duration, but we at present enjoy the benefit of an increasing moon, and seldom return until ten o'clock, when, as we approach the shore, we are saluted by the delightful scent of flowers and new- mown grass, and the chirp of the grasshoppers, and the song of the evening birds. – The Life and Letters of Mary Wollstonecraft Shelley, Volume I (of 2) by Florence A. Thomas Marshall
  2. How long he had missed the sight of a bird, and the sound of their chirp and song! – Uarda, Complete A Romance Of Ancient Egypt by Georg Ebers Last Updated: March 8, 2009