saturate vs upheap

saturate

verb
  • To fill to excess. 

  • To cause to become completely impregnated, or soaked (especially with a liquid). 

  • To satisfy the affinity of; to cause a substance to become inert by chemical combination with all that it can hold. 

  • To render pure, or of a colour free from white light. 

adj
  • Very intense. 

  • Saturated; wet. 

noun
  • Something saturated, especially a saturated fat. 

upheap

verb
  • To pile or heap up; accumulate. 

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