Hi bigpapaleo,
We do have Glossary’s available. This one is for UE4 overall: Unreal Engine Terminology | Unreal Engine 5.1 Documentation
And although a little sparse at the moment, his one is specifically for Blueprints: Glossary of Blueprints Visual Scripting Terms in Unreal Engine | Unreal Engine 5.1 Documentation
If you still have questions try taking a look through the UE4 Wiki and our extensive documentation.
Hope that helps.
Thanks, TJ