ebb vs extend

ebb

verb
  • To cause to flow back. 

  • to fish with stakes and nets that serve to prevent the fish from getting back into the sea with the ebb 

  • to flow back or recede 

  • to fall away or decline 

adj
  • low, shallow 

noun
  • A European bunting, the corn bunting (Emberiza calandra, syns. Emberiza miliaria, Milaria calandra). 

  • The receding movement of the tide. 

  • A gradual decline. 

  • A low state; a state of depression. 

extend

verb
  • To cause to last for a longer period of time. 

  • To reenlist for a further period. 

  • To increase in quantity by weakening or adulterating additions. 

  • To value, as lands taken by a writ of extent in satisfaction of a debt; to assign by writ of extent. 

  • To straighten (a limb). 

  • Of a class: to be an extension or subtype of, or to be based on, a prototype or a more abstract class. 

  • To increase in extent. 

  • To cause to increase in extent. 

  • To possess a certain extent; to cover an amount of space. 

  • To bestow; to offer; to impart; to apply. 

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