There are 80 words that start with 'milli'.
Note: These 80 words that start with 'milli' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with millio, millim, millia, millin, millil, millir, millie, millig, millip, millih, millib, millic, millid, millis, milliv, milliw.