slick vs smoothen

slick

verb
  • To make slick. 

adj
  • Slippery or smooth due to a covering of liquid; often used to describe appearances. 

  • Sleek; smooth. 

  • Extraordinarily great or special. 

  • Appearing expensive or sophisticated. 

  • Clever, making an apparently hard task easy. 

  • Superficially convincing but actually untrustworthy. 

noun
  • A tool used to make something smooth or even. 

  • A helicopter. 

  • A wide paring chisel used in joinery. 

  • A camera-ready image to be used by a printer. The "slick" is photographed to produce a negative image which is then used to burn a positive offset plate or other printing device. 

  • In omegaverse fiction, the copious, lubricating bodily fluid produced by an omega in heat. 

  • Someone who is clever and untrustworthy. 

  • A tire with a smooth surface instead of a tread pattern, often used in auto racing. 

  • A covering of liquid, particularly oil. 

smoothen

verb
  • To make smooth. 

  • To become smooth. 

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