crayfish vs lobster

crayfish

noun
  • A rock lobster (family Palinuridae). 

  • Any of numerous freshwater decapod crustaceans in superfamily Astacoidea or Parastacoidea, resembling the related lobster but usually much smaller. 

  • The species Thenus orientalis of the slipper lobster family (Scyllaridae). 

  • A freshwater crustacean (family Cambaridae), sometimes used as an inexpensive seafood or as fish bait. 

  • A freshwater crayfish (family Parastacidae), such as the gilgie, marron, or yabby. 

verb
  • to catch crayfish 

lobster

noun
  • A crustacean of the Palinuridae family, pinkish red in colour, with a hard, spiny shell but no claws, which is used as a seafood. 

  • A crustacean of the Nephropidae family, dark green or blue-black in colour turning bright red when cooked, with a hard shell and claws, which is used as a seafood. 

  • A soldier or officer of the imperial British Army (due to their red or scarlet uniform). 

  • An Australian twenty dollar note, due to its reddish-orange colour. 

adj
  • Red-colored, especially from a sunburn. 

verb
  • To fish for lobsters. 

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