There are 13 words that start with 'millio'.
| million | milliohm |
| millions | milliohms |
| millionth | millionths |
| milliosmol | millionaire |
| millionfold | milliosmols |
| millionaires | millionairess |
| millionairesses | |
Note: These 13 words that start with 'millio' are found from the USA & Canada version of the tournament Scrabble word list.