birr vs kink

birr

verb
  • To lurch or set to spinning. 

  • To make a whirring noise; make a noise like that of revolving wheels, or of millstones at work. 

noun
  • The currency of Ethiopia, divided into 100 santims. 

  • A strong trilling. 

  • The force of movement; rush, impetus, momentum, driving force 

  • A whirring noise 

  • strength, vigor, energy 

kink

verb
  • To form a kink or twist. 

  • To laugh loudly. 

  • To be formed into a kink or twist. 

  • To gasp for breath as in a severe fit of coughing. 

noun
  • A convulsive fit of coughing or laughter; a sonorous indraft of breath; a whoop; a gasp of breath caused by laughing, coughing, or crying. 

  • A positive 1-soliton solution to the sine-Gordon equation. 

  • A tight curl, twist, or bend in a length of thin material, hair etc. 

  • An unreasonable notion; a crotchet; a whim; a caprice. 

  • A difficulty or flaw that is likely to impede operation, as in a plan or system. 

  • Peculiarity or deviation in sexual behaviour or taste. 

  • A person with peculiar sexual tastes. 

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