In the long run it doesn't matter, call them what you will. I've got a client that doesn't even use the term "nonconformity", to them everything is an opportunity.
Now what we have as a real definition of an ISO Objective is:
"An objective is a result you intend to achieve. Objectives can be
strategic, tactical, or operational and can apply to an organization
as a whole or to a system, process, project, product, or service.
Objectives may also be referred to as targets, aims, goals,
or intended outcomes."