What word can mean ‘moving in a slow, heavy, awkward way’ and also refer to ‘wood sawn into rough planks or otherwise partly prepared’?

Lumber 

The word 'lumber' in its noun form means discarded parts of wood or unfinished scarps of it. 

In its noun form, the word 'lumber' can be used in a sentence as follows: "The man hacked at the tree trunk for lumber". 

The word 'lumber' in its verb form means to move in a slow, heavy, awkward way. 

In its verb form, the word 'lumber' can be used in a sentence as follows: "He lumbered into his room after returning from the bar."