There are 17 8-letter words that start with 'geo'.
| geodesic | geodetic | geoducks | geognosy |
| geologer | geologic | geomancy | geometer |
| geometry | geophagy | geophone | geophyte |
| geoponic | geoprobe | georgics | geotaxes |
| geotaxis | |||
Note: These 17 8-letter words that start with 'geo' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with geom, geop, geos, geoc, geod, geol, geot, geog, geob, geoh, geor, geoi.
5-letter words start with 'geo' (2)