(a.) Having a powerful, far-reaching voice or speech.

bawling blatant boanergean boisterous brawling brazen-mouthed clamorous clamoursome crying full-throated loud-voiced multivocal noisy obstreperous openmouthed screaming shouting stentorian strident trumpet-tongued trumpet-voiced vociferant vociferating vociferous yammering yapping yelling yelping