Can we use the term CONTAMINATED RUNWAY for other meanings, such as: oil spill or debris on the runway?
From the FAA Pilot/Controllers Glossary Book:


  CONTAMINATED RUNWAY− A runway is
  considered contaminated whenever standing water,
  ice, snow, slush, frost in any form, heavy rubber, or
  other substances are present. A runway is contaminated
  with respect to rubber deposits or other
  friction-degrading substances when the average
  friction value for any 500-foot segment of the runway
  within the ALD fails below the recommended
  minimum friction level and the average friction value
  in the adjacent 500-foot segments falls below the
  maintenance planning friction level. 


(See also ICAO Circular on Runway Surface Condition Assessment Measurement and Reporting) Thanks to mins.

So this covers rubber and oil, but not debris.

However, from searching the glossary there are no instances of the word "debris" in the document. Usually if debris or oil were noticed on a runway, ATC would close the runway (issue a NOTAM) and then use an alternate runway until the debris or oil were cleaned up. 

From a pilots perspective, if you notice debris on the runway just tell ATC (provided you didn't hit it), and they will close the runway for a FOD (foreign object debris) check. My local airport does this usually twice a day or more, typically by running a car down the runway looking for debris.