What's the difference between apish and apishness?

Apish

Definition:

• (a.) Having the qualities of an ape; prone to imitate in a servile manner. Hence: Apelike; fantastically silly; foppish; affected; trifling.

Example Sentences:

Apishness

Definition:

• (n.) The quality of being apish; mimicry; foppery.

Example Sentences: