Modifiers matching biscuit:

• plain,
• soft,
• hard,
• popular,
• sweet,
• savoury,
• raised,

Simple categories matching plain:

• cookie,
• food,
• cracker,
• object,
• plant,
• meat,
• fun,
• thing,
• fruit,
• biscuit,
• dish,
• ware,
• material,
• bread,
• vegetable,
• bearing,
• surface,
• ingredient,
• item,
• starches,
• wood,
• hardware,
• papers,
• bird,
• grain,
• fare,
• cereal,
• paper,
• vessel,
• box,
• dessert,