Modifiers matching sound:

• natural,
• loud,
• small,
• up,
• exotic,
• analog,
• repetitive,
• environmental,
• conventional,
• large,
• musical,
• symbolic,
• familiar,
• subtle,
• unusual,
• annoying,
• sudden,
• animal,
• ceremonial,
• sharp,
• interior,
• audible,
• quiet,
• acoustic,
• concrete,
• vocal,
• realistic,
• airborne,
• mental,
• alert,
• complex,
• miscellaneous,
• simple,
• meaningful,
• relevant,
• pleasant,
• electrical,
• impulsive,
• distant,
• modern,
• acceptable,
• locomotive,
• new,
• positive,
• vital,
• internal,
• powerful,
• structured,
• continuous,
• good,
• outside,
• real,
• constant,
• cardiovascular,
• stationary,
• odd,
• organic,
• fast,
• magical,
• unique,
• nonverbal,
• indoor,
• quick,
• strange,
• nonlinguistic,
• midi,
• periodic,
• rhythmic,
• melodic,
• clear,
• external,
• false,
• extra,
• industrial,
• auxiliary,
• abnormal,
• creepy,
• actual,
• complicated,
• accidental,
• tonal,
• traditional,
• useful,
• non-musical,
• outdoor,
• abstract,
• interfering,
• violent,
• synthetic,
• essential,
• unwanted,
• exterior,
• noisy,
• unpredictable,
• unexplainable,
• typical,
• original,
• common,
• frightening,
• defined,
• pleasurable,
• ambient,
• regular,
• soft,
• important,
• classical,
• metallic,
• nonmusical,
• unexpected,
• physiologic,
• neutral,
• biological,
• harmonic,
• domestic,
• wrong,
• dry,
• linear,
• everyday,
• short,
• therapeutic,
• respiratory,
• broadband,
• electronic,
• interesting,
• basic,
• extraneous,
• metaphorical,
• artificial,
• weather,
• instrumental,
• heavy,
• interactive,
• significant,
• gentle,
• operational,
• mechanical,
• unformed,
• regional,
• distinct,
• ordinary,
• individual,
• physiological,
• atmospheric,
• diverse,
• world,
• linguistic,
• bronchial,
• valuable,
• pure,
• peripheral,
• transient,
• random,
• geological,
• normal,
• contemporary,
• anthropogenic,
• dynamic,
• related,
• weaker,
• desirable,
• percussive,
• organized,
• additional,

Simple categories matching frightening:

• animal,
• experience,
• creature,
• disease,
• character,
• thing,
• unit,
• image,
• illness,
• event,
• sound,
• symptom,
• object,
• condition,
• perception,
• disorder,