thunder vs whisper

thunder

noun
  • A deep, rumbling noise resembling thunder. 

  • The spotlight. 

  • An alarming or startling threat or denunciation. 

  • The loud rumbling, cracking, or crashing sound caused by expansion of rapidly heated air around a lightning bolt. 

verb
  • To say (something) with a loud, threatening voice. 

  • To make a noise like thunder. 

  • To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity. 

  • To (make something) move very fast (with loud noise). 

  • To produce something with incredible power. 

whisper

noun
  • A low rustling sound, like that of the wind in leaves. 

  • A private message to an individual in a chat room. 

  • A rumor. 

  • A faint trace or hint (of something). 

  • The act of speaking in a quiet voice, especially, without vibration of the vocal cords. 

verb
  • To speak softly, or under the breath, so as to be heard only by one near at hand; to utter words without sonant breath; to talk without that vibration in the larynx which gives sonorous, or vocal, sound. 

  • To speak with suspicion or timorous caution; to converse in whispers, as in secret plotting. 

  • To make a low, sibilant sound. 

  • To mention privately and confidentially, or in a whisper. 

How often have the words thunder and whisper occurred in a corpus of books? (source: Google Ngram Viewer )