Question: "blow" used in the same way in the following two sentences?

To blow a horse.

Blow now!
Answer: different meanings
Question: "back" used in the same way in the following two sentences?

I back you all the way.

Back this enterprise.
Answer: the same meaning
Question: "ulteriority" used in the same way in the following two sentences?

A terrible feeling of ulteriority.

Their conversation was limited to ulteriorities.
Answer: the same meaning
Question: "key" used in the same way in the following two sentences?

The key to development is economic integration.

They were carrying two keys of heroin.
Answer:
different meanings