If I want to authorize a card for payment but only charge after the service is delivered, is “tokenization” the correct term for this process?

Tokenization is something completely different. I agree with Bozo Juretic that authorization and capture is the preferred way to go.

Tokenization is the replacement of sensitive data with a unique identifier that cannot be mathematically reversed. In your environment, tokens take the place of sensitive credit card data.
Source: Payment Tokenization