decline vs tip

decline

verb
  • To bend downward; to bring down; to depress; to cause to bend, or fall. 

  • To choose not to do something; refuse, forbear, refrain. 

  • To run through from first to last; to recite in order as though declining a noun. 

  • To cause to decrease or diminish. 

  • To turn or bend aside; to deviate; to stray; to withdraw. 

  • To move downwards, to fall, to drop. 

  • To inflect for case, number, gender, and the like. 

  • To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play. 

  • To become weaker or worse. 

  • To recite all the different declined forms of (a word). 

noun
  • A weakening. 

  • Downward movement, fall. 

  • A reduction or diminution of activity. 

  • The act of declining or refusing something. 

  • A sloping downward, e.g. of a hill or road. 

tip

verb
  • (To cause) to become knocked over, fall down or overturn. 

  • (To cause) to be, or come to be, in a tilted or sloping position; (to cause) to become unbalanced. 

  • To dump (refuse). 

  • To provide with a tip; to cover the tip of. 

  • To cause the contents of a container to be emptied out by tilting it. 

  • To give a small gratuity to, especially to an employee of someone who provides a service. 

  • To predict or bet on something having a particular outcome. 

  • To deflect with one′s fingers, especially one′s fingertips. 

  • To give a piece of private information to; to inform (someone) of a clue, secret knowledge, etc. 

  • To pour a libation or a liquid from a container, particularly from a forty of malt liquor. 

  • To give, pass. 

noun
  • Synonym of eartip (“part of earbuds”) 

  • A thin, boarded brush made of camel's hair, used by gilders in lifting gold leaf. 

  • A small piece of meat. 

  • A gratuity; a small amount of money left for a bartender, waiter, taxi driver or other servant as a token of appreciation. 

  • A recycling centre. 

  • A piece of advice. 

  • Rubbish thrown from a quarry. 

  • The end of a bow of a stringed instrument that is not held. 

  • A very untidy place. 

  • A piece of metal, fabric or other material used to cover the top of something for protection, utility or decoration. 

  • The act of deflecting with one's fingers, especially the fingertips 

  • An area or a place for dumping something, such as rubbish or refuse, as from a mine; a heap (see tipple); a dump. 

  • A piece of stiffened lining pasted on the inside of a hat crown. 

  • An act of tipping up or tilting. 

  • A kick or phase; one's current habits or behaviour. 

  • A tram for expeditiously transferring coal. 

  • A particular arena or sphere of interest; a front. 

  • The extreme end of something, especially when pointed; e.g. the sharp end of a pencil. 

  • A piece of private or secret information, especially imparted by someone with expert knowledge about sporting odds, business performance etc. 

  • A prediction or bet about the outcome of something. 

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