There are 11 12-letter words that start with 'mac'.
| macadamizing | machicolated | machinations |
| mackintoshes | macrocytoses | macrocytosis |
| macrofossils | macrogametes | macronuclear |
| macronucleus | macropterous | |
Note: These 11 12-letter words that start with 'mac' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with macr, mach, maca, mace, macu, mack, macc, maci, macl, maco, macs.
4-letter words start with 'mac' (4)