hairline vs thin

hairline

adj
  • very thin, as thin as a hair 

noun
  • A fishing line made from hair. 

  • The line along one's forehead where hair starts growing. 

  • A very thin line in writing, drawing, or typography. 

  • A very thin fissure. 

thin

adj
  • Having little body fat or flesh; slim; slender; lean; gaunt. 

  • Scarce; not close, crowded, or numerous; not filling the space. 

  • Describing a poorly played golf shot where the ball is struck by the bottom part of the club head. See fat, shank, toe. 

  • Very narrow in all diameters; having a cross section that is small in all directions. 

  • Slight; small; slender; flimsy; superficial; inadequate; not sufficient for a covering. 

  • Of low viscosity or low specific gravity. 

  • Of a route: relatively little used. 

  • Poor; scanty; without money or success. 

  • Having little thickness or extent from one surface to its opposite. 

  • Lacking body or volume; small; feeble; not full. 

adv
  • Not thickly or closely; in a scattered state. 

verb
  • To remove some plants or parts of plants in order to improve the growth of what remains. 

  • To make thin or thinner. 

  • To dilute. 

  • To become thin or thinner. 

noun
  • Any food produced or served in thin slices. 

  • A loss or tearing of paper from the back of a stamp, although not sufficient to create a complete hole. 

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