There are 20 words that start with 'old'.
| old | olds | oldy |
| olden | older | oldie |
| oldest | oldies | oldish |
| oldness | oldster | oldwife |
| oldsquaw | oldsters | oldstyle |
| oldwives | oldnesses | oldsquaws |
| oldstyles | oldfangled | |
Note: These 20 words that start with 'old' are found from the USA & Canada version of the tournament Scrabble word list.