There are 6 13-letter words that start with 'zo'.
| zombification | zoogeographer |
| zoogeographic | zooplanktonic |
| zoosporangium | zooxanthellae |
Note: These 6 13-letter words that start with 'zo' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with zoo, zon, zom, zor, zoa, zoe, zou, zod, zoi, zoc, zos, zoy, zof, zow.
3-letter words start with 'zo' (2)