SynonymDefinitionAntonym.com - English Synonym Dictionary

The act of making or becoming a single unit

The act of pairing a male and female for reproductive purposes

A device on a national flag emblematic of the union of two or more sovereignties (typically in the upper inner corner)

The occurrence of a uniting of separate parts

An organization of employees formed to bargain with the employer

A political unit formed from previously independent people or organizations

A set containing all and only the members of two or more given sets

The United States (especially the northern states during the American Civil War)

Healing process involving the growing together of the edges of a wound or the growing together of broken bones

The state of being joined or united or linked

The state of being a married couple voluntarily joined for life (or until divorce)

Of trade unions

Being of or having to do with the northern United States and those loyal to the Union during the American Civil War