Modifiers matching polygon:

• elongated,
• primitive,
• irregular,
• planar,
• regular,
• general,
• small,
• simple,
• fundamental,
• common,
• contiguous,
• basic,
• special,
• linear,
• convex,
• flat,
• compact,
• base,
• symmetric,
• familiar,
• elementary,
• closed,
• solid,
• popular,
• round,

Simple categories matching contiguous:

• area,
• structure,
• region,
• surface,
• organs,
• file,
• wall,
• polygon,