Whispered Synonyms and Antonyms

To make a low, continuous, and indistinct sound
(Verb)
Silent
(Adjective)
Synonyms:
  1. droned
Speak softly; in a low voice
(Verb)
Antonyms:
  1. shouted
  2. yelled
To speak or utter indistinctly, as by lowering the voice or partially closing the mouth
(Verb)