There are 13 12-letter words that start with 'oc'.
| occasionally | occidentally | occultations |
| occupational | oceanography | oceanologies |
| oceanologist | ochlocracies | octahedrally |
| octapeptides | octogenarian | octosyllabic |
| octosyllable | ||
Note: These 13 12-letter words that start with 'oc' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with oct, occ, oce, och, ocu, oca, ocr, oci, ock, oco.
3-letter words start with 'oc' (1)