14-Letter Words Containing: C,E,E,F,O,R,R

• A device that uses diffraction (especially X-ray diffraction) to investigate the structure of matter.

• failure to act with the prudence that a reasonable person would exercise under the same circumstances

• a military operation (often involving new supplies of men and materiel) to strengthen a military force or aid in the performance of its mission

• information that makes more forcible or convincing

• (psychology) a stimulus that strengthens or weakens the behavior that produced it

• a device designed to provide additional strength

• an act performed to strengthen approved behavior

• measuring instrument for measuring the refractive index of a substance