Modifiers matching period:

• specified,
• busy,
• floral,
• special,
• over,
• off,
• literary,
• quiet,
• set,
• residential,
• prescribed,
• seasonal,
• short,
• dry,
• procedural,
• wet,
• relevant,
• diverse,
• longer,
• heavy,
• limited,
• substantial,
• uncertain,
• stressful,
• future,
• muslim,
• discrete,
• shortened,
• promotional,
• intensive,
• industrial,
• archeological,
• common,
• unstable,
• long,
• important,
• classical,
• hectic,
• windy,
• defined,
• intense,
• small,
• reasonable,
• cold,
• painful,
• prolonged,
• irregular,
• smaller,
• holy,
• fixed,
• waiting,
• shorter,
• extraordinary,
• natural,
• vulnerable,
• basic,
• real,
• acute,
• christian,
• productive,
• statutory,
• major,
• unfavourable,
• key,
• significant,
• congested,
• historical,
• reproductive,
• regular,
• popular,
• crucial,
• festive,
• difficult,
• standard,
• critical,
• fiscal,
• developmental,

Simple categories matching longer:

• period,
• instrument,
• season,
• line,
• interval,
• duration,
• unit,
• time,
• term,