hum vs zip

hum

noun
  • An often indistinct sound resembling human humming. 

  • Unpleasant odour. 

  • A phenomenon, or collection of phenomena, involving widespread reports of a persistent and invasive low-frequency humming, rumbling, or droning noise not audible to all people. 

  • Busy activity, like the buzz of a beehive. 

  • A hummed tune, i.e. created orally with lips closed. 

intj
  • Synonym of um: a noise indicating doubt, uncertainty, &c. 

  • Synonym of hmm: a noise indicating thought, consideration, &c. 

verb
  • To produce low sounds which blend continuously 

  • To express by humming. 

  • To reek, smell bad. 

  • To make a sound from the vocal chords without pronouncing any real words, with one's lips closed. 

  • To drone like certain insects naturally do in motion, or sounding similarly 

  • To buzz, be busily active like a beehive 

zip

noun
  • The high-pitched sound of a small object moving rapidly through air. 

  • An ounce of marijuana. 

  • Synonym of convolution (“type of mapping function”) 

  • Zero; nothing. 

  • A zip fastener. 

  • Energy; vigor; vim. 

  • A trip on a zipline. 

  • A zip file. 

intj
  • Imitative of high-pitched sound of a small object moving rapidly through air. 

verb
  • To move rapidly (in a specified direction or to a specified place) with a high-pitched sound. 

  • To close as if with a zip fastener. 

  • To subject to the convolution mapping function. 

  • To make (something) move quickly 

  • To compress (one or more computer files) into a single and often smaller file, especially one in the ZIP format. 

  • To move in haste (in a specified direction or to a specified place). 

  • To travel on a zipline. 

  • To close with a zip fastener. 

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