There are 14 12-letter words that start with 'mil'.
| militantness | militarising | militaristic | 
| militarizing | millenarians | millesimally | 
| milliamperes | millidegrees | millihenries | 
| millilambert | millimicrons | millionaires | 
| milliradians | milliseconds | |
Note: These 14 12-letter words that start with 'mil' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with mill, mili, milk, mild, mile, milt, mila, milo, milc, milf, miln, milp, milr, mils.
4-letter words start with 'mil' (7)