There are 6 12-letter words that start with 'eng'.
| engarlanding | engineerings | engorgements | 
| engraftments | engrossingly | engrossments | 
Note: These 6 12-letter words that start with 'eng' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with engr, engi, enga, engl, engo, engu, enge, engs.
4-letter words start with 'eng' (1)