To make a wooden sword look more realistic, you can employ various techniques to enhance its appearance. Here are some suggestions:

1. Shape and proportions: Ensure that the wooden sword has the proper shape and proportions of the specific sword style you are replicating. Research the design details of the sword you want to emulate and shape the wooden sword accordingly.
2. Surface texture: Use sandpaper or a file to add texture to the wood, creating a more realistic appearance. Pay attention to areas like the blade and handle to mimic the grain or patterns found on real swords.
3. Finishing techniques: Apply a suitable finish or stain to the wooden sword to enhance its appearance. This can include using wood stains, varnishes, or paints to replicate the color and texture of different sword parts, such as the blade or hilt. Experiment with different finishes to achieve the desired effect.
4. Fittings and details: Add additional elements like tsuba (guard) and tsuka-ito (handle wrapping) to simulate the traditional components of a sword. These can be created using materials such as metal, leather, or cord. Pay attention to details like engravings or patterns, if applicable to the sword style you are replicating.
5. Aging and weathering effects (optional): If you want to give the wooden sword a weathered or aged appearance, consider using techniques like distressing, staining, or adding subtle scratches and dents to replicate wear and tear. Use aging techniques sparingly to maintain a realistic balance.
6. Proper weight and balance (optional): Depending on your preference and intended use, you can add weights or adjust the distribution of weight in the wooden sword to achieve a more authentic feel. Be mindful not to compromise safety or usability by adding excessive weight.

Remember, when working on a wooden sword, prioritize safety and ensure that the final result remains suitable for its intended use. If the wooden sword is intended for display or cosplay purposes, you have more flexibility in terms of techniques and materials used. However, if it will be used for training or martial arts, prioritize durability, balance, and safety considerations.

It's always a good idea to reference real swords, seek inspiration from historical examples, or consult with experienced sword enthusiasts or craftsmen to ensure that your wooden sword accurately captures the essence and appearance of the real thing.