collateral vs pledge

collateral

noun
  • A security or guarantee (usually an asset) pledged for the repayment of a loan if one cannot procure enough funds to repay. 

  • Printed materials or content of electronic media used to enhance sales of products (short form of collateral material). 

  • A thinner blood vessel providing an alternate route to blood flow in case the main vessel becomes occluded. 

  • A branch of a bodily part or system of organs. 

adj
  • Expensive to the extent of being paid through a loan. 

  • Of an indirect ancestral relationship, as opposed to lineal descendency. 

  • Acting in an indirect way. 

  • Parallel, along the same vein, side by side. 

  • Being aside from the main subject, target, or goal. 

  • Relating to a collateral in the sense of an obligation or security. 

  • Corresponding; accompanying, concomitant. 

  • Having the phloem and xylem adjacent. 

  • Coming or directed along the side. 

pledge

noun
  • An asset or person temporarily handed over to guarantee the fulfilment of something promised, under threat of permanent loss of the thing handed over; surety, security, hostage. 

  • A solemn promise to do something. 

  • The personal property so pledged, to be kept until the debt is paid. 

  • A bailment of personal property to secure payment of a debt without transfer of title. 

  • A person who has taken a pledge of allegiance to a college fraternity, but is not yet formally approved. 

  • A drinking toast. 

  • A promise to abstain from drinking alcohol. 

verb
  • To deposit something as a security; to pawn. 

  • To make a solemn promise (to do something). 

  • To give assurance of friendship by the act of drinking; to drink to one's health. 

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