plonk vs retard

plonk

verb
  • To set or toss (something) down carelessly. 

  • To sit down heavily and without ceremony. 

  • To automatically ignore a particular poster. 

adv
  • Precisely and forcefully. 

intj
  • The sound made by something solid landing. 

  • The supposed sound of adding a user to one's killfile. 

noun
  • Cheap or inferior everyday wine. 

  • AC Plonk 

  • A female police constable. 

  • The sound of something solid landing. 

retard

verb
  • To put off; to postpone. 

  • To decelerate; to slow down. 

  • To keep delaying; to continue to hinder; to prevent from progressing. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

  • A person or being who is extremely stupid or slow to learn. 

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