Subduction occurs at destructive plate boundaries. It is when a heavier/denser oceanic plate gets pushed down into the mantle by the less dense continental plate. The point where the oceanic plate subducts is called the subduction zone.
Well, subduction is a process where two boundaries move under each other there can be also known as "subduction zones" which is where most of the subduction happens. The boundaries can be called convergent boundaries.
Just remember that subduction is when two boundaries go under each other.
