Synonyms for Blare (same or very similar meaning)
WordNet sense 1 (a loud harsh or strident noise):
cacophony, clamor, din, blaringWordNet sense 2 (make a loud noise):
beep, honk, toot, claxonWordNet sense 3 (make a strident sound):
blastFrom the ODE community, based on WordNetadd/edit