i have iphone 14 pro and Macbook pro. can i use my macbook charger/adapter to charge my iphone 14

Yes.

Fast charge your iPhone - Apple Support (IN)

You can fast charge your iPhone 8 or later up to 50 per cent battery in around 30 minutes. Find testing information for various iPhone models.

To fast charge, you need an iPhone 15 model with a USB-C cable like the one that came in the box, or an earlier iPhone model with a USB-C to Lightning cable and one of these adapters:

• Apple 18W, 20W, 29W, 30W, 35W, 61W, 67W, 87W or 96W, or 140W USB-C Power Adapter
• A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)