| Word | Definitions | Synonyms |
|---|---|---|
| doctoral | (adjective) of or relating to a doctor or doctorate | Synonyms: doctorial |
| doctorial | (adjective) of or relating to a doctor or doctorate | Synonyms: doctoral |
| doctrinaire | (adjective) stubbornly insistent on theory without regard for practicality or suitability | - |
| doctrinal | (adjective) relating to or involving or preoccupied with doctrine | - |
| postdoctoral | (adjective) of or relating to study or research that is done after work for the doctoral degree has been completed | - |