UNIONISM
unionism, trade unionism
(noun) the system or principles and theory of labor unions
Source: WordNet® 3.1
Etymology
Noun
unionism (countable and uncountable, plural unionisms)
The support of advocacy of a union, especially of a trade union
(often, capitalised) Support for the North (the Union) during the American Civil War
(often, capitalised) Support for the continuance of the United Kingdom (especially with respect to Northern Ireland)
Anagrams
• misunion
Source: Wiktionary
Un"ion*ism, n.
1. The sentiment of attachment to a federal union, especially to the
federal union of the United States.
2. The principles, or the system, of combination among workmen
engaged in the same occupation or trade.
Source: Webster’s Unabridged Dictionary 1913 Edition