There are several synonyms for the term "liquid extract," including tincture, essence, concentrate, infusion, and elixir. A tincture is a highly concentrated liquid extract that is often made with alcohol as the solvent. An essence is a highly concentrated liquid extract made by distillation or solvent extraction. A concentrate is a liquid extract that has had its water content removed through a drying process. An infusion is a liquid extract made by steeping herbs or other plant materials in hot water. An elixir is a liquid extract that is sweetened and flavored for medicinal purposes. These synonyms can be used interchangeably in different contexts to describe liquid extracts made from various sources.