vocal, vociferous, voluble

Vocal refers to the voice, the making of sounds, or to people who express themselves candidly.

• Brad’s cat gets vocal when she wants to be let out.

• Cécile was a vocal critic of her boss’s leadership style.

Vociferous describes forceful and noisy communication.

• The speaker could not be heard above the vociferous heckling.

Voluble people are talkative, speaking rapidly and for long periods.

• Philip likes the sound of his own voice; he is always so voluble.