Unionism
- Community unionism
- Craft unionism
- Dual unionism
- Industrial unionism
- Ittihadism
- New Unionism
- Open-source unionism
- Serbian–Montenegrin unionism
- Social Movement Unionism
- Solidarity unionism
- Spanish unionism
- Unification (disambiguation)
- Unification of Albania and Kosovo
- Unification of Moldova and Romania
- Union (American Civil War)
- Union (disambiguation)
- Unionism in Belgium
- Unionism in England
- Unionism in Ireland
- Unionism in Scotland
- Unionism in Wales
- Unionism in the United Kingdom
- Unionist (disambiguation)
- Voluntary student unionism