naturalist vs zoo

naturalist

noun
  • An expert in natural history or the study of plants and animals. 

  • A person who believes in or advocates the tenets of philosophical or methodological naturalism. 

  • A creative artist who attempts to faithfully represent nature; an adherent of artistic naturalism. 

zoo

noun
  • A zoophile. 

  • A park where live animals are exhibited. 

  • A large and varied collection of something. 

  • The jungle. 

  • Any place that is wild, crowded, or chaotic. 

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