Is a black hole a wormhole?

Could you please clarify for me, is a black hole actually a wormhole? I've heard some theories that suggest they might be related, but I'm not entirely sure how. Do black holes possess some of the characteristics of a wormhole, allowing for travel between different regions of space-time? Or are they completely distinct phenomena, with black holes being the result of gravitational collapse and wormholes being theoretical bridges connecting separate universes? I'm trying to understand the nuances of these concepts and how they might intersect, if at all. Could you help me with this?