- coincident
- coincident lines
- coincident points
- coincident roots
- coindex
- coinduced
- coinduced module
- coinduced topology
- coin flipping
- coinitial
- coinitiality
- coinitial mappings
- coinitial set
- coin-matching game
- coin paradox
- coin problem
- cointegral
- cointegral object
- cointegration
- cointegration analysis
- cointersection
- coin tossing
- coin-tossing game
- coinverse
- coirreducible category