There are 12 7-letter words that start with 'deca'.
| decadal | decades | decagon | decalog | 
| decamps | decanal | decanes | decants | 
| decapod | decares | decayed | decayer | 
Note: These 12 7-letter words that start with 'deca' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with decar, decal, decap, decam, decan, decad, decay, decag, decas, decat, decaf, decah.
5-letter words start with 'deca' (3)