Modifiers matching objective:

• invisible,
• functional,
• concrete,
• occupational,
• internal,
• measurable,
• corporate,
• related,
• monthly,

Simple categories matching invisible:

• offense,
• entity,
• force,
• elements,
• symptom,
• being,
• difference,
• item,
• diversity,
• quantity,
• variable,
• agent,
• symbol,
• cause,
• thing,
• power,
• wave,
• disability,
• state,
• particle,
• image,
• defect,
• course,
• substructure,
• material,
• nature,
• contaminant,
• substance,
• object,
• level,
• quality,
• germ,
• condition,
• disease,
• radiation,
• ink,
• microbe,
• reality,
• ray,
• illness,
• attribute,
• trait,
• creature,
• matter,
• character,
• trade,
• light,
• structure,
• vision,
• ideal,
• phenomenon,
• adhesive,
• microorganism,
• property,
• process,
• import,
• objective,
• gas,
• difficulty,
• organism,
• fluid,
• energy,
• range,