Category Nuances for coastline:

• irregular,
• looking,
• physical,
• exposed,
• natural,
• real,
• complex,
• windy,
• linear,
• vertical,
• solid,
• coastal,
• geologic,
• fragile,
• fixed,
• geographical,
• world,

Simple Categories for coastline:

• surface,
• formation,
• boundary,
• object,
• space,
• outline,
• location,
• point,
• region,
• zone,
• land,