- constellations architecture
- constipation
- constipation instrument
- constipation in the elderly
- constituent
- constituent-command
- Constituent Congress of Tucumán
- constituent day
- constituent element
- constituent gas
- constituent mass
- constituent quark
- constituent quark number scaling
- constituent quark-number scaling
- constituent ratio of essential medicines
- constituent structure tree
- Constitutio Antoniniana
- Constitutio Criminalis Carolina
- constitution
- Constitution Act（1982）
- constitutional appeal
- constitutional change
- Constitutional Convention
- Constitutional Convention of Colombia in 1910
- constitutional conventions