1. car factory a factory where automobiles are manufactured
  2. verificatory serving to support or corroborate
  3. cover for provide an excuse or alibi for someone so as to cover up guilt
  4. cover letter a letter sent along with other documents to provide additional information
  5. common factor an integer that divides two (or more) other integers evenly
  6. conversion factor factor by which a quantity that is expressed in one set of units must be multiplied in order to convert it into another set of units
  7. calefactory serving to heat
  8. cover crop crop planted to prevent soil erosion and provide green manure
  9. cofactor a substance (as a coenzyme) that must join with another to produce a given result
  10. safety factor the ratio of the breaking stress of a structure to the estimated maximum stress in ordinary use
  11. growth factor a protein that is involved in cell differentiation and growth
  12. causal factor a determining or causal element or factor
  13. fudge factor a quantity that is added or subtracted in order to increase the accuracy of a scientific measure
  14. cover charge a fixed charge by a restaurant or nightclub over and above the charge for food and drink
  15. refractory stubbornly resistant to authority or control
  16. cover glass a small and very thin piece of glass used to cover the specimen on a microscope slide
  17. Rh factor a blood group antigen possessed by Rh-positive people
  18. benefactor a person who helps people or institutions
  19. cover girl a very pretty girl who works as a photographer's model
  20. convector a space heater that transfers heat to the surrounding air by convection