friction

n. abrasion, scraping; discord, conflict, dissension

Friction is the force of two surfaces in contact. It is not a fundamental force, as it is derived from electromagnetic forces between atoms. When contacting surfaces move relative to each other, the friction between the two objects converts kinetic energy into thermal energy, or heat. Friction between solid objects is often referred to as Dry Friction and frictional forces between two fluids (gases or liquids) as Fluid Friction. In addition to these there is also Internal Friction which illustrates a body's ability to recover from external deformation. Contrary to popular belief, sliding friction is not caused by surface roughness, but by chemical bonding between the surfaces. Surface roughness and contact area, however, do effect sliding friction for micro- and nano-scale objects where surface area forces dominate inertial forces.
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Friction /fric·tion/ 1. the act of rubbing. 2. massage using a circular or back-and-forth rubbing movement, used especially for massage of deep [more]Friction - Community and Resources

Noun
1. a state of conflict between persons
(synonym) clash
(hypernym) conflict
2. the resistance encountered when one body is moved in contact with another
(synonym) rubbing
(hypernym) resistance
(hyponym) grinding, abrasion, attrition, detrition
3. effort expended in rubbing one object against another
(synonym) detrition, rubbing
(hypernym) effort, elbow grease, exertion, travail, sweat
(hyponym) attrition

n. rub down, friction, chafing, rub