parent vs sire

parent

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

noun
  • A surrogate parent 

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

  • A parent company. 

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

  • 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. 

sire

verb
  • to father; to beget. 

noun
  • A male animal that has fathered a particular offspring (especially used of domestic animals and/or in biological research). 

  • A lord, master, or other person in authority, most commonly used vocatively: formerly in speaking to elders and superiors, later only when addressing a sovereign. 

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