- colossal
 - colour fatigue
 - chroma sampling structure
 - chromatogram
 - colour balance
 - constricted
 - concept
 - chasm
 - cavitation
 - concluding chapter (of a book)
 - clove (of a garlic)
 - cleft
 - centroid
 - ceiling
 - constituent part
 - cooking
 - co_share (in landed property)
 - crack
 - change or variation (for the worse)
 - caricature
 - conversion
 - changed
 - cracking sound
 - case_to_infection ratio
 - case_fatality proportion
 - cutting off
 - cheek arch
 - cheek to
 - cleft sternum
 - committal to memory
 - coding sheet
 - coding decoding technique
 - coding scheme
 - coding check
 - coding form
 - cryptography
 - cryptologic
 - cryptographical
 - cryptogenic infection
 - criticising
 - criticism
 - calling
 - curriculum vitae
 - commentary-esp. on a sutra
 - concentrational exercise
 - cursive
 - continuity check
 - continuity army council
 - continuing trespass
 - continuity knob