Tears of joy simile
The speaker describes the celebrations after the king and queen are rightfully restored to the throne, describing "tears of joy" that "fell like rain." This simile describes the movement of the tears down their faces, giving a visual indication of what is happening.
The Queen's complexion
The queen is described as looking pale, "as though she were dead." This simile is used to describe her weak and frail appearance after she falls ill.
Empty words metaphor
The Queen uses the phrase "empty words," to metaphorically describe how words are something that can contain other things. As such, she uses this metaphor to describe how the King's words have no meaning or reality behind them.
The Queen's death
The Queen's kidnapping is ultimately a metaphor for her death. She is taken by the Fairy King after falling ill, which symbolizes the end of her life on earth, and her transition to the afterlife. However, Orfeo is able to save his wife after showing incredible courage and bravery.
The King's Crown
The King's crown is described as being "bright as the noonday sun." This emphasizes the King's affluence and power, and the fact that his leadership is pure and good.