Modifiers matching tray:

• difficult,
• plastic,
• shallow,
• wooden,
• larger,
• flat,
• sliding,
• special,

Simple categories matching shallow:

• stream,
• distinction,
• person,
• actress,
• tray,
• politician,
• pool,
• lure,
• writer,
• receptacle,
• bay,
• actor,
• pond,
• feature,
• advisor,
• estuary,
• delta,
• bully,
• reporter,
• water,
• queen,
• fool,
• article,
• director,
• narcissist,
• bowl,
• playwright,
• sportsman,
• diarist,
• waterway,
• humorist,
• philosopher,
• area,
• source,
• guru,
• quality,
• novelist,
• cover,
• poet,
• box,
• pan,
• princess,
• form,
• villain,
• ware,
• father,
• pot,
• athlete,
• footballer,
• tyrant,
• pundit,
• defect,
• state,
• bow,
• president,
• gentleman,
• dish,
• comedian,
• container,
• singer,
• basin,
• system,
• object,
• vessel,
• surface,
• structure,