Is there a difference between rendering engine and layout engine

Per http://ift.tt/2pu2KKs
"Web browsers consist of a user interface, layout engine, rendering engine, JavaScript interpreter, UI backend, networking component and data persistence component. These components achieve different functionalities of a web browser and together provide all capabilities of a web browser."

However, I cannot find a reference to a difference between a layout engine and a rendering engine. Are these synonyms?