C
| Mondlango | English |
| Cado | Chad |
| cagrena | sad |
| calko | chalk |
| cambro | chamber, room |
| campano | champagne |
| campio | champion |
| canso | chance |
| canelo | channel |
| canji | change |
| canso | chance |
| capelo | chapel |
| capto | chapter |
| car | because |
| carito | charity |
| carji | to charge |
| carjo | charge, burden |
| carma | charm |
| carto | charter |
| casi | chase |
| casta | chaste |
| cati | chat |
| cateyo | chat room |
| cedi | cede |
| cefa | chief |
| ceki | check(v.) |
| ceko | check(n.) |
| celebri | celebrate |
| celo | sky |
| cela | celestial |
| celvolbo | firmament |
| Celsia | Celsius |
| cemento | cement |
| cendo | cent |
| ceno | chain |
| cent | hundred |
| yercento | century |
| centimetro | centimeter |
| centra | central |
| cepo | onion |
| ceramiko | ceramics |
| cerbo | brain |
| cerbumi | think hard |
| cerebelo | cerebellum |
| ceremono | ceremony |
| cerio | cherry |
| cerko | coffin |
| cerubo | cherub |
| cervo | deer, stag |
| certa | certain |
| cesi | cease |
| cetera | other |
| Cilio | Chile |
| cimpanzo | chimpanzee |
| Cino | China |
| cinano | Chinese |
| ci | this |
| cia | every |
| cial | all reason |
| ciam | forever |
| cie | everywhere |
| ciel | everyway |
| cifro | cipher |
| cikado | cicada |
| ciklono | cyclone |
| ciklotrono | cyclotron |
| cilindro | cylinder |
| cindro | cinder |
| cinika | cynical |
| cio | all |
| ciom | everything |
| cipa | cheap |
| cipreso | cypress |
| cirklo | circle |
| cirko | circus |
| cirkuli | circulate |
| cirkum | around |
| cirkumi | surround |
| cirkumo | surrounding |
| cirkumcizi | circumcise |
| cirkumflekso | circumflex |
| cirkumskribi | circumscribe |
| cirkumstanso | circumstance |
| cirkwito | circuit |
| ciroso | cirrhosis |
| cisterno | cistern |
| cisto | cyst |
| citi | cite |
| ciu | everybody |
| cius | everyone's |
| civila | civil |
| civilizo | civilization |
| cokolo | chocolate |
| copstikos | chopsticks |
| cu | question adverb |