dun vs dusk

dun

noun
  • A brownish grey colour. 

  • A collector of debts, especially one who is insistent and demanding. 

  • A fly made to resemble the mayfly subimago. 

  • A newly hatched, immature mayfly; a mayfly subimago. 

  • An ancient or medieval fortification; especially a hill-fort in Scotland or Ireland. 

  • A mound or small hill. 

  • An urgent request or demand of payment. 

  • A structure in the Orkney or Shetland islands or in Scotland consisting of a roundhouse surrounded by a circular wall; a broch. 

intj
  • Imitating a deep bass note, such as that found in suspenseful music. 

verb
  • To harass by continually repeating e.g. a request. 

  • To ask or beset a debtor for payment. 

adj
  • Of a brownish grey colour. 

dusk

noun
  • A darkish colour. 

  • The condition of being dusky; duskiness 

  • A period of time at the end of day when the sun is below the horizon but before the full onset of night, especially the darker part of twilight. 

verb
  • To begin to lose light or whiteness; to grow dusk. 

  • To make dusk. 

adj
  • Tending to darkness or blackness; moderately dark or black; dusky. 

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