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