Synonyms for Boast:

n.

bear, tend, grow in, wear, seem, bristle with, rate. hubris, flamboyance, grandstanding, praise, self-promotion, one-upmanship, flash, rodomontade. hold, command, show off, patronize, be full of yourself, owned, enjoy, possess. Fanfaronade. boast (noun)
braggadocio, gas, swash, jactitation, self-approbation, vaunt, vanity, blow, bluster, bombast, shoot a line, tout, sport, bravado, boasting, self-praise, pretension, feature, brag, gasconade.
brag (noun)
bragging, source of pride, avowal, self-satisfaction.
brag; source of pride (noun)
braggadocio, pretension, self-satisfaction, gasconade, bluster, pride, avowal, vaunt, bravado, bombast.
communication (noun)
jactitation, boasting, self-praise.
exaggeration (noun)
rodomontade.
ostentation (noun)
flamboyance.

v.

boast (verb)
cock-a-doodle-doo, pontificate, gloat, brag, flaunt, parade, aggrandize, blow, vaunt, saunter, preen, prance, bluster, strut, bluff, crow, peacock, swagger, lord.
brag (verb)
show off, aggrandize, flaunt, gloat, cock-a-doodle-doo, preen, strut, blow, glory, swagger, crow.
communication (verb)
brag, bluster, gasconade, gas, blow, vaunt, swash, tout, shoot a line.
pride (verb)
glory, pride, esteem, honor.
to have advantage (verb)
possess.

Other synonyms:

one-upmanship, show off, hubris, Fanfaronade, self-promotion, grandstanding. rodomontade. patronize. enjoy, possess. command, hold. flash. Other relevant words:
command, hubris, bragging, flash, boasting, one-upmanship, shoot a line, gas, Fanfaronade, possess, self-promotion, swash, self-satisfaction, patronize, grandstanding, jactitation, hold, tout, gasconade, rodomontade, feature, enjoy, sport, avowal.

Usage examples for boast

  1. " I have done so, but I cannot boast of much skill," said Fidelia. – Eunice by Margaret Murray Robertson
  2. She stated her intention of walking across the moor to Lydford and catching the train there, which was needless expense, as she might have gone down to St. Mary Tavy station; but she desired to make a great journey, something to boast of in days to come. – Furze the Cruel by John Trevena
  3. He was furious when he heard Djorak's boast – The City Curious by Jean de Bosschère