Deliberately vs Premeditated - What's the difference?

As an adverb deliberately

is intentionally, or after deliberation; not accidentally.

(premeditate).

planned, considered or estimated in advance; deliberate.

(en adverb)

Intentionally, or after deliberation; not accidentally.

He deliberately broke that, didn't he?

Taking one's time, slowly and carefully.

After being called upon, he strode deliberately up to the blackboard.

(head)

(premeditate)

(-)

Planned, considered or estimated in advance; deliberate.

premeditated assault

a premeditated act of aggression

a premeditated breach of contract

in the face of premeditated criminal acts

caused by grossly negligent or premeditated infringement of duty

There is no proof of premeditated or grossly negligent wrongdoing.

* unpremeditated