Procumbent and Prone

Procumbent adjective - Having stems that trail along the ground without putting down roots.

Prone is a synonym for procumbent in flat topic. In some cases you can use "Prone" instead an adjective "Procumbent", when it comes to topics like horizontal.

Prone adjective - Having a tendency to be or act in a certain way.

Procumbent is a synonym for prone in horizontal topic. You can use "Procumbent" instead an adjective "Prone", if it concerns topics such as lying down, face down. rare substitute