Modifiers matching sign:

• red,
• flexible,
• temporary,
• vital,
• sensorial,
• light,
• sacred,
• outdoor,
• noncommercial,
• transient,
• lightweight,
• symbolic,
• visible,
• animal,
• critical,
• nonverbal,
• mathematical,
• visual,
• exempt,
• modern,
• external,
• mental,
• early,
• auditory,
• digital,
• regular,
• exterior,
• emotional,
• directional,
• physical,
• special,
• new,
• positive,
• important,
• private,
• vocal,
• complex,
• developmental,
• structural,
• medical,
• outward,
• nonlinguistic,
• legal,
• clinical,
• recognisable,
• specialized,
• promotional,
• oversized,
• larger,
• local,
• formal,
• linguistic,
• unusual,
• elementary,
• repetitive,
• cold,
• tangible,
• common,
• basic,
• discrete,
• musical,
• graphic,
• wooden,
• geometric,
• color,
• audible,
• typographical,
• public,
• meaningful,
• christian,
• surrounding,
• motor,
• feminine,
• cardiovascular,
• nervous,
• toxic,
• written,
• oral,
• normal,
• recognizable,
• freestanding,
• diacritic,
• logical,
• large,
• flying,
• durable,
• editorial,
• informational,
• moveable,
• small,
• conventional,
• detailed,
• vertical,
• clear,
• verbal,
• distinct,
• religious,
• abstract,
• simple,
• specified,
• primitive,
• severe,
• natural,
• official,
• inflatable,
• national,
• flat,
• traditional,
• artificial,
• concrete,
• soft,
• electronic,
• cultural,
• ordinary,
• secondary,
• commercial,
• behavioral,
• objective,
• social,
• neuropsychiatric,
• decorative,
• economic,
• weather,
• subtle,
• smaller,
• episodic,
• minor,
• neurological,
• initial,
• negative,
• seasonal,
• representational,
• abnormal,
• neurologic,
• sensitive,
• incidental,
• changing,
• static,
• physiological,
• permanent,
• graphical,
• behavioural,
• varied,
• corporate,
• typical,
• metal,
• romantic,

Simple categories matching noncommercial:

• activity,
• use,
• organization,
• means,
• energy,
• institution,
• recording,
• building,
• literature,
• group,
• polysaccharide,
• species,
• location,
• area,
• enterprise,
• usage,
• facility,
• source,
• content,
• vehicle,
• recreation,
• outlet,
• organisation,
• craft,
• sign,
• entity,
• works,
• establishment,