friction

1. A state of conflict between persons (synset 114004622)
   is a type of: conflict - a state of opposition between persons or ideas or interests
   same as: clash
2. The resistance encountered when one body is moved in contact with another (synset 111479937)
   is a type of: resistance - any mechanical force that tends to retard or oppose motion
   subtypes:

   • abrasion, attrition, detrition, grinding - the wearing down of rock particles by friction due to water or wind or ice
   • adhesive friction, grip, traction - the friction between a body and the surface on which it moves (as between an automobile tire and the road)
   same as: rubbing
3. Effort expended in moving one object over another with pressure (synset 100713284)
   is a type of: effort, elbow grease, exertion, sweat, travail - use of physical or mental energy; hard work
   subtypes: attrition - the act of rubbing together; wearing something down by friction
   same as: detrition, rubbing

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