The difference between Eyewash and Window dressing

Eyewash as a noun (countable, uncountable):

A soothing medicated lotion for the eyes

Eyewash as a noun (uncountable, slang):

Nonsense; flattery; pretentiousness.

Eyewash as a verb:

To fool with nonsense or flattery.

Eyewash as a verb (intelligence):

To keep information secret by sending false information to many people in one's own organization, and correct information to a select few.

Window dressing as a noun:

The decorative display of retail merchandise in store windows; the goods and trimmings used in such a display.

Window dressing as a noun (uncountable):

The process, skill or task of creating such a display.

Window dressing as a noun (idiomatic, uncountable):

A means of creating a deceptively favourable impression of something or someone; something for appearance only.