Quarterly Update 19, Winter 2020
| Headword | Part of Speech | Update Type |
| chicken corn soup | n | Revised Entry |
| chicken sallet | n | New Entry |
| Choctaw beer | n | Revised Entry |
| clawfish | n | New Sense, Revised Sense |
| clay root | n | Revised Entry |
| clear | adv | Revised Sense |
| clear light | adv | New Entry |
| clearn | adv | New Entry |
| clearn | v | New Entry |
| cliff lettuce | n | Revised Entry |
| clip and clean | adv phr | Revised Entry |
| clip and clear | adv phr | New Entry |
| quill | n | Revised Sense |
| toy | n | New Sense |