Category Nuances for polystyrene_foam:

• lightweight,
• buoyant,
• weaker,
• resilient,
• soft,
• polymeric,
• coarse,
• weak,
• organic,
• incidental,
• sensitive,
• plastic,
• thicker,
• thick,
• compressible,
• artificial,
• compliant,
• thermoplastic,
• nonmagnetic,
• cellular,
• common,

Simple Categories for polystyrene_foam:

• material,
• substrate,
• foam,
• contaminant,
• solid,