Category Nuances for nut_shell:

• carbonaceous,
• woody,
• agricultural,
• inert,
• raw,
• hard,
• dry,
• organic,
• coarse,
• diverse,
• harsh,
• lighter,
• solid,

Simple Categories for nut_shell:

• particle,
• material,
• residue,
• waste,
• structure,
• abrasive,
• precursor,
• filler,
• fiber,
• substance,