Morganatic marriage is a term used to describe a type of marriage where the couple comes from different social standings. The term has been traditionally used for marriages where one spouse is of high social rank, and the other is of lower social standing. Synonyms for morganatic marriage include "left-handed marriage," "unequal marriage," "marriage of the left hand," and "marriage by the left hand." Other terms are "morganic marriage," "morganate marriage," and "morganatic union." Many of these terms are considered outdated and not widely used in modern society. However, the term "morganatic marriage" is still widely used in legal and historical contexts.