purl vs thunder

purl

verb
  • To flow with a murmuring sound in swirls and eddies. 

  • To rise in circles, ripples, or undulations; to curl; to mantle. 

  • To use an inverted stitch producing ribbing etc. 

  • To decorate with fringe or embroidered edge 

noun
  • A gentle murmuring sound, such as that produced by the running of a liquid among obstructions. 

  • A tern. 

  • a heavy or headlong fall; an upset. 

  • A circle made by the motion of a fluid; an eddy; a ripple. 

  • A particular stitch in knitting; an inversion of stitches giving the work a ribbed or waved appearance. 

  • The edge of lace trimmed with loops. 

  • An embroidered and puckered border; a hem or fringe, often of gold or silver twist; also, a pleat or fold, as of a band. 

thunder

verb
  • To make a noise like thunder. 

  • To say (something) with a loud, threatening voice. 

  • To produce thunder; to sound, rattle, or roar, as a discharge of atmospheric electricity. 

  • To (make something) move very fast (with loud noise). 

  • To produce something with incredible power. 

noun
  • The spotlight. 

  • An alarming or startling threat or denunciation. 

  • The loud rumbling, cracking, or crashing sound caused by expansion of rapidly heated air around a lightning bolt. 

  • A deep, rumbling noise resembling thunder. 

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