Embodiments of golf club heads and methods to manufacture golf club heads are generally described herein. In one example, a golf club head may have a toe portion, a heel portion, a top portion, a sole portion, a back portion, and a front portion with a face opening. The golf club head may have a face portion joined to the body portion and covering the face opening. The golf club head may include an interior cavity partially, substantially, or entirely filled with a structural adhesive. Other examples and embodiments may be described and claimed.