union vs disunion

union and disunion both are nouns.

Word	Noun	Adjective	Verb	Adverb
union	Yes	Yes	No	No
disunion	Yes	No	No	No

union (noun)	disunion (noun)
the act of making or becoming a single unit	the termination or destruction of union
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
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)

union (adjective)	disunion (adjective)
of trade unions