Orangery is a term used to describe a greenhouse or conservatory used primarily for the cultivation of subtropical and tropical plants, particularly oranges and other citrus fruits. However, there are several synonyms for this word that may be useful when writing or speaking about these structures. One alternative is a citrus house, which accurately reflects the purpose of an orangery. Another term is a hot house, which can refer to any type of greenhouse where temperatures are controlled for plant growth. A sun parlor or solarium is another alternative, which emphasizes the abundance of natural light that is typically necessary for cultivating tropical plants.