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."