thump vs thunder

thump

verb
  • To cause to make a thumping sound. 

  • To throb with a muffled rhythmic sound. 

  • To hit (someone or something) as if to make a thump. 

  • To thud or pound. 

noun
  • A blow that produces a muffled sound. 

  • The sound of such a blow; a thud. 

thunder

verb
  • To make a noise like thunder. 

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

  • 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. 

noun
  • 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. 

  • A deep, rumbling noise resembling thunder. 

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