noun (n)

• a state of conflict between persons(noun.state)

  Synonym:
  clash
  

  source: wordnet30
• the resistance encountered when one body is moved in contact with another(noun.phenomenon)

  Synonym:
  rubbing
  

  source: wordnet30
• effort expended in moving one object over another with pressure(noun.act)

  Synonym:
  detrition, rubbing
  

  source: wordnet30
• The act of rubbing the surface of one body against that of another; attrition; in hygiene, the act of rubbing the body with the hand, with flannel, or with a brush etc., to excite the skin to healthy action.(noun)

  source: webster1913