lithic vs rockbound

lithic

adj
  • Relating to rock 

  • Relating to stone 

  • Relating to lithium 

  • Relating to the formation of uric acid concretions (stones) in the bladder and other parts of the body 

  • pertaining to Native American culture before circa 8,500 BCE 

noun
  • A stone tool or projectile 

  • A medicine that prevents stone in the bladder. 

  • A lithic fragment: a piece of another rock eroded down to sand size. 

rockbound

adj
  • Surrounded by rocks. 

  • Limited in frequency because of a limited supply of crystals. 

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