There are 19 words that start with 'orb'.
| orb | orbs | orby |
| orbed | orbit | orbier |
| orbing | orbits | orbiest |
| orbital | orbited | orbiter |
| orbless | orbitals | orbiters |
| orbiting | orbicular | orbiculate |
| orbicularly | ||
Note: These 19 words that start with 'orb' are found from the USA & Canada version of the tournament Scrabble word list.