| Competing | Competition | Competitive |
| Competitor | Compiano | Compiler |
| Complaint | Complement (set theory) | Completely (album) |
| Complex number | Compose | Composer |
| Compositae | Composition | Compositor |
| Compostela | Compostela Valley | Compostela, Cebu |
| Compostela, Compostela Valley | Compostela, Davao de Oro | Compound |
| Compound ng mga Kennedy | Comprehensive Agrarian Reform Program | Comprehensive Nuclear-Test-Ban Treaty |
| Compress | Compression | Compression bandage |
| Compsognathidae | Compsognathus | Compsohalieus |
| Compton, California | Computability theory | Computation |
| Computational chemistry | Computational complexity theory | Computational mathematics |
| Computational physics | Compute | Computer |
| Computer display | Computer engineer | Computer engineering |
| Computer graphics | Computer hardware | Computer keyboard |
| Computer language | Computer monitor | Computer mouse |
| Computer network | Computer networking | Computer prank |
| Computer program | Computer programming | Computer science |
| Computer sciences | Computer scientist | Computer scientists |
| Computer screen | Computer sex | Computer software |
| Computer softwares | Computer speaker | Computer speakers |
| Computer Virus | Computing | Computus |
| Compvtvs | Comun Nuovo | Comunanza |
| Comune | Comune di Aisone | Comuni |
| Comunidad Foral de Navarra | Comunidad Valenciana | Comunitat Valenciana |
| Con Banda: Grandes Éxitos | Con Dao | Cona (VE) |
| Cona, Veneto | Conakry | Conan Doyle |
| Conan Gray | Conan O'Brien | Conan O’Brien |
| Conan, My Beautician | Conand, Ain | Conón |
| Conca Casale | Conca dei Marini | Conca della Campania |
| Concamarise | Concepción | Concepción, Antioquia |
| Concepción, Santander | Concepción, Tsile | Concepcion, Amulung, Cagayan |
| Concepcion, Iloilo | Concepcion, Misamis Occidental | Concepcion, Romblon |
| Concepcion, Tarlac | Concepcion, Tsile | Concern |
| Concert at the Park | Concerviano | Concesio |
| Conching Rosal | Conchita Wurst | Concilio de Constanza |
| Concilio Vaticano II | Concilium | Concilium Vaticanum Secundum |
| Conclave | Conco, Italy | Concord |
| Concord (California) | Concord (New Hampshire) | Concord Technical Institute |
| Concord, Bagong Hampshire | Concord, California | Concord, Kalipornia |
| Concord, Kaliporniya | Concord, New Hampshire | Concorde |
| Concordia (Antioquia) | Concordia College | Concordia Sagittaria |
| Concordia sulla Secchia | Concordia, Antioquia | Concordia, Magdalena |
| Concorezzo | Concrete | Concrete recycling |
| Concuera, Romblon | Concupiscence | Concupiscencia |
| Concupiscentia | Concussion | Condado |
| Condamine, Ain | Condeissiat | Condensed matter physics |
| Condensed milk | Condenser | Condestable |
| Condino | Conditional | Conditional implication |
| Conditionals | Conditioning | Conditioning exercise |
| Conditioning exercises | Condofuri | Condom |
| Condoto | Condoto (Chocó) | Condove |
| Condrò | Conduct | Conducting |
| Conductive | Conductor | Conductor of music |
| Conductress | Cone | Conegliano |
| Coney Reyes | Coney Reyes Mumar | Coney Reyes on Camera |
| Coney Reyes-Mumar | Coney Reyes-Mumar Drama Studio | Confédération suisse |
| Confederate States of America | Confederation suisse | Confederatong Mga Sultanato ng Lanao |
| Confederazione Svizzera | Confederaziun Svizra | Confess |
| Confessing Church | Confession | Confession sacrament |
| Confessor | Confienza | Configni |
| Confine | Confined | Confinement |
| Confines | Confirmation bias | Confirmatory bias |
| Confiteor | Conflenti | Confoederatio Helvetica |
| Confort | Confrançon | Confucian |
| Confucianism | Confucianismo | Confucianist |
| Confuciano | Confucius | Confucius Institute |
| Congenital disease | Congenital disorder | Congenital heart disease |
| Conger | Conggo | Conggo Republic |
| Conggoles | Congo | Congo (Brazzaville) |
| Congo (paglilinaw) | Congo Republic | Congo River |
| Congo trypanosomiasis | Congo-Brazzaville | Congo-Kinshasa |
| Congoles | Congolese | Congress |
| Congress College | Congress of a cow | Congress of the Philippines |
| Congressional | Congressional Avenue | Congressional system |
| Conic | Conical | Conical flask |
| Coniolo | Conjugal dictatorship | Conjunctivitis |
| Connecticut | Conner | Conner, Apayao |
| Connie Abad | Connie Angeles | Connie Francis |
| Connie Sison | Connor Jessup | Connotation |
| Conrad Bain | Conrad III | Conrad III ng Alemanya |
| Conrad III of Germany | Conrad Nantwin | Conrad S. Bain |
| Conrad Stafford | Conrad Stafford Bain | Conrado Conde |
| Conrado Estrella III | Conrado II, Duke ng Bohemia | Conrado III |
| Conrado III ng Alemanya | Consaca | Conscious |
| Conscious of self | Conscious self | Consciousness |
| Consciousness of self | Conselice | Conselve |
| Consequence | Consequence relation | Consequent |
| Conservation of mass | Conservatism | Conservative Party (UK) |
| Consiglio di Rumo | Consolacion | Consolacion, Cebu |
| Consolatrix College | Consonant | Consort |
| Constable | Constableship | Constabulary |
| Constance Council | Constance Mary Pott | Constancia Angeline Nubla |
| Constancia Nubla | Constanin Brancusi | Constans |
| Constans I | Constans II | Constans II (Imperyong Bizantino) |
| Constant | Constante | Constantin BrâncuÅŸi |
| Constantin BrâncuÈ™i | Constantin Gâlcă | Constantine I |
| Constantine II | Constantine II (emperador) | Constantine II (emperor) |
| Constantine III | Constantine III (Byzantine emperor) | Constantine III (emperor) |
| Constantine IV | Constantine the Great | Constantine V |
