Modifiers matching installation:

• secure,
• permanent,
• fixed,
• primary,
• big,
• large,
• important,
• electrical,
• interior,
• protective,
• sloping,
• critical,
• commercial,
• unmanned,
• radio,
• military,
• necessary,
• academic,
• hazardous,
• difficult,
• productive,
• additional,
• complicated,
• vital,
• larger,
• outdoor,
• expensive,
• essential,
• fighting,
• aquatic,
• physical,
• technological,
• off,
• shared,
• industrial,
• architectural,
• simple,
• national,
• alert,
• coastal,
• environmental,
• spatial,
• subsurface,
• concrete,
• inshore,
• chemical,
• medium,
• particular,
• functional,
• quick,
• semipermanent,
• occupied,
• stationary,
• metallic,
• exterior,
• floating,
• stable,
• modern,
• indoor,
• real,
• corporate,
• specialized,
• single,
• communal,
• light,
• base,
• domestic,
• isolated,
• centralized,
• covered,
• central,
• hydraulic,
• unique,
• incidental,
• institutional,
• tubular,
• overhead,
• structural,
• federal,
• agricultural,
• auxiliary,
• proper,
• vulnerable,
• mechanical,
• marine,
• sanitary,
• advanced,
• public,
• closed,
• current,
• smaller,
• linear,
• remote,
• appropriate,
• special,
• horizontal,
• internal,
• harsh,
• maritime,
• wet,
• down,
• underwater,
• mobile,
• defensive,
• external,
• minor,
• supporting,
• sensitive,
• major,
• ancillary,
• impressive,
• temporary,
• scientific,
• convenient,
• electronic,
• typical,
• inside,
• unattended,
• vertical,
• key,
• official,
• complete,
• nuclear,
• nearby,
• social,
• peripheral,
• new,
• strategic,
• individual,
• limited,
• basic,
• self,
• economic,
• multiple,
• recreational,
• dynamic,
• interactive,
• small,
• outside,
• static,
• complex,
• size,
• movable,
• surrounding,
• controlled,
• high,
• sized,
• civilian,
• underground,
• technical,
• electric,
• thick,
• avionic,
• portable,
• moving,
• decorative,
• unusual,
• professional,
• exposed,
• residential,
• audiovisual,
• modular,

Simple categories matching difficult:

• idea,
• zone,
• location,
• product,
• area,
• surface,
• activity,
• rock,
• dog,
• contaminant,
• disorder,
• flow,
• material,
• works,
• emotion,
• condition,
• tray,
• disease,
• suit,
• item,
• vessel,
• information,
• sugar,
• soil,
• subject,
• event,
• joint,
• powder,
• concern,
• fuel,
• tumour,
• symptom,
• job,
• article,
• waste,
• text,
• system,
• matrix,
• image,
• fluid,
• fibre,
• time,
• place,
• pose,
• language,
• maneuver,
• bond,
• environment,
• infection,
• metal,
• placement,
• dirt,
• video,
• shape,
• pregnancy,
• process,
• illness,
• behaviour,
• group,
• substrate,
• crossing,
• trait,
• plastic,
• texture,
• medium,
• times,
• fire,
• peak,
• insecticide,
• particle,
• artifact,
• feeling,
• delivery,
• structure,
• object,
• surgery,
• hardware,
• work,
• ground,
• labor,
• dermatosis,
• stuff,
• setting,
• apparatus,
• picture,
• position,
• commodity,
• tank,
• matter,
• feature,
• period,
• component,
• access,
• case,
• obstacle,
• course,
• science,
• measurement,
• installation,
• shot,
• years,
• institution,
• issue,
• container,
• behavior,
• fiber,
• quarry,
• part,
• region,
• site,
• stain,
• original,
• mission,
• instrument,
• compound,
• injury,
• profession,
• thing,
• treatment,
• content,
• topic,
• substance,
• carbohydrate,
• food,
• reality,
• discipline,
• space,
• odor,
• polymer,
• circumstances,
• signal,
• situation,
• target,
• concept,
• stone,
• conflict,
• math,
• cave,
• fabric,
• point,
• question,
• coating,
• class,
• terrain,
• sector,
• card,
• articulator,
• state,
• weather,
• problem,
• deposit,