9
alliances(noun, confederations)
7
leagues(noun, collections, confederations)
6
marriages(noun, marriages)
5
coalitions(noun, collections, confederations)
5
federations(noun, collections, confederations)
4
combinations
4
partnerships(noun, collections)
4
societies(noun, collections)
4
unities(noun, unities)
3
coincidences(noun, unities)
3
confederations(noun, confederations)
3
conjugations(noun, marriages)
3
groups(noun, collections)
3
matrimonies(noun, marriages)
3
weddings(noun, marriages)
2
associations
2
blocs(noun, collections)
2
circles
2
clubs
2
conjunctions
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APASmart Define. (2015). unions thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/unions/thesaurus/synonyms
ChicagoSmart Define. 2015. "unions thesaurus" https://smartdefine.org/unions/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, unions thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/unions/thesaurus/synonyms>.
MLASmart Define. "unions thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/unions/thesaurus/synonyms>