| complicity | Participation or partnership, as in wrong-doing or with a wrong-doer. |
| compliment | To address or gratify with expressions of delicate praise. |
| component | A constituent element or part. |
| comport | To conduct or behave (oneself). |
| composure | Calmness. |
| comprehensible | Intelligible. |
| comprehension | Ability to know. |
| comprehensive | Large in scope or content. |
| compress | To press together or into smaller space. |
| compressible | Capable of being pressed into smaller compass. |
| compression | Constraint, as by force or authority. |
| comprise | To consist of. |
| compulsion | Coercion. |
| compulsory | Forced. |
| compunction | Remorseful feeling. |
| compute | To ascertain by mathematical calculation. |
| concede | To surrender. |
| conceit | Self-flattering opinion. |
| conceive | To form an idea, mental image or thought of. |
| concerto | A musical composition. |
| concession | Anything granted or yielded, or admitted in response to a demand, petition, or claim. |
| conciliate | To obtain the friendship of. |
| conciliatory | Tending to reconcile. |
| conclusive | Sufficient to convince or decide. |
| concord | Harmony. |
| concordance | Harmony. |
| concur | To agree. |
| concurrence | Agreement. |
| concurrent | Occurring or acting together. |
| concussion | A violent shock to some organ by a fall or a sudden blow. |
| condensation | The act or process of making dense or denser. |
| condense | To abridge. |
| condescend | To come down voluntarily to equal terms with inferiors. |
| condolence | Expression of sympathy with a person in pain, sorrow, or misfortune. |
| conduce | To bring about. |
| conducive | Contributing to an end. |
| conductible | Capable of being conducted or transmitted. |
| conduit | A means for conducting something, particularly a tube, pipe, or passageway for a fluid. |
| confectionery | The candy collectively that a confectioner makes or sells, as candy. |
| confederacy | A number of states or persons in compact or league with each other, as for mutual aid. |
| confederate | One who is united with others in a league, compact, or agreement. |
| confer | To bestow. |
| conferee | A person with whom another confers. |
| confessor | A spiritual advisor. |
| confidant | One to whom secrets are entrusted. |
| confide | To reveal in trust or confidence. |
| confidence | The state or feeling of trust in or reliance upon another. |
| confident | Assured. |
| confinement | Restriction within limits or boundaries. |
| confiscate | To appropriate (private property) as forfeited to the public use or treasury. |