| brightness(noun, understanding, understand, sense, judgment) |
| brilliance(noun, understanding, understand, sense, judgment) |
| broach |
| care(noun, control, understanding, head, refinement) |
| castles in the air(noun, expression, idiom, concept, understanding) |
| caution(understanding, knowledge, sense, wisdom, savvy) |
| circumspection(understanding, knowledge, sense, caution, wisdom) |
| clairvoyance(noun, feeling, perception, instinct, premonition) |
| clear thinking(expression, understanding, knowledge, sense, wisdom) |
| clearness(noun, characteristic, quality, understanding, taste) |
| cogency |
| coition |
| coitus |
| common sense(noun, expression, control, understanding, knowledge) |
| concept(noun, understanding, view, idea, thought) |
| conception(noun, concept, understanding, view, idea) |
| conduit |
| consideration(noun, concept, control, understanding, view) |
| control(noun, understanding, care, head, refinement) |
| coruscation(noun, understanding, understand, sense, judgment) |