litter vs parent

litter

noun
  • The offspring of a mammal born in one birth. 

  • Material used as bedding for animals. 

  • A platform mounted on two shafts, or a more elaborate construction, designed to be carried by two (or more) people to transport one (in luxury models sometimes more) third person(s) or (occasionally in the elaborate version) a cargo, such as a religious idol. 

  • Collectively, items discarded on the ground. 

  • A covering of straw for plants. 

  • Absorbent material used in an animal's litter tray 

  • Layer of fallen leaves and similar organic matter in a forest floor. 

verb
  • To drop or throw trash without properly disposing of it (as discarding in public areas rather than trash receptacles). 

  • To give birth to, used of animals. 

  • To strew (a place) with scattered articles. 

  • To supply (cattle etc.) with litter; to cover with litter, as the floor of a stall. 

  • To scatter carelessly about. 

  • To be supplied with litter as bedding; to sleep or make one's bed in litter. 

  • To produce a litter of young. 

parent

noun
  • One of the two persons from whom one is immediately biologically descended; a mother or father. 

  • A surrogate parent 

  • An organism from which a plant or animal is immediately biologically descended. 

  • A parent company. 

  • The object from which a child or derived object is descended; a node superior to another node. 

  • A person who acts as a parent in rearing a child; a step-parent or adoptive parent. 

  • The nuclide that decays into a daughter nuclide. 

  • The source or origin of something. 

  • A third person who has provided DNA samples in an IVF procedure in order to alter faulty genetic material 

  • Sponsor, supporter, owner, protector. 

verb
  • To act as parent, to raise or rear. 

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