There are 14 words that start with 'subca'.
| subcaste | subcause |
| subcastes | subcauses |
| subcavity | subcabinet |
| subcapsular | subcategory |
| subcavities | subcategories |
| subcategorize | subcategorized |
| subcategorizes | subcategorizing |
Note: These 14 words that start with 'subca' are found from the USA & Canada version of the tournament Scrabble word list.