There are 16 words that start with 'subma'.
| submarine | submarket |
| submanager | submarined |
| submariner | submarines |
| submarkets | submaximal |
| submanagers | submarginal |
| submariners | submarining |
| submaxillary | submandibular |
| submandibulars | submaxillaries |
Note: These 16 words that start with 'subma' are found from the USA & Canada version of the tournament Scrabble word list.