eight vs eight-oar

eight

noun
  • The eight people who crew a rowing-boat. 

  • A race in which such craft participate. 

  • The digit/figure 8. 

  • Any of the four cards in a normal deck with the value eight. 

  • A light, narrow rowing boat, especially one used in competitive rowing, steered by a cox, in which eight rowers each have two oars. 

num
  • Describing a group or set with eight elements. 

  • A numerical value equal to 8; the number occurring after seven and before nine. 

eight-oar

noun
  • Synonym of eight (“narrow rowing boat with eight rowers”) 

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