What is the difference between Envelop and Envelope?

What is the difference between Envelop and Envelope? :

Envelop : (verb)

( 1 ) Cover or surround

Wrap something / someone up

The baby was enveloped in a blanket.

The mountains are enveloped in cloud.

Envelope : (noun)

( 1 ) Wrapper or covering especially made of paper for a letter

Give me an airmail envelope.

I do not have writing paper or envelope.

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