There are 15 words that start with 'decal'.
| decal | decals |
| decalog | decalogs |
| decalcify | decaliter |
| decalogue | decaliters |
| decalogues | decalcified |
| decalcifies | decalcifying |
| decalcomania | decalcomanias |
| decalcification | |
Note: These 15 words that start with 'decal' are found from the USA & Canada version of the tournament Scrabble word list.