clob - colored sweep
- coenosarc
- coenosis
- coenospecies
- coenosteum
- coercivity
- coeruleite
- coeruleolactite
- coesite
- coetaneous
- coeval
- coexist
- coffer
- cofferdam
- coffin
- coffin-lid crystal
- coffinite
- cog
- cogeoid
- cognate
- cognate ejecta
- cognate enclosures
- cognate xenolith
- cognation
- cohade
- cohenite
- coherence
- coherence criterion
- coherence filtering
- coherence filtration
- coherent
- coherent alluvium
- coherent energy
- coherent event
- coherent noise
- coherent noise attenuation
- coherent reflections
- coherent rock
- coherent rocks
- coherent signal
- coherent source