sperm vs spore

sperm

noun
  • The reproductive cell or gamete of the male; a spermatozoon. 

  • Semen; the generative substance of male animals. 

  • Sperm oil; whale oil from a sperm whale; spermaceti. 

verb
  • To ejaculate on or into. 

  • To ejaculate. 

spore

noun
  • A reproductive particle, usually a single cell, released by a fungus, alga, or plant that may germinate into another. 

  • A thick resistant particle produced by a bacterium or protist to survive in harsh or unfavorable conditions. 

verb
  • To produce spores. 

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