There are 13 12-letter words that start with 'colo'.
| cologarithms | colonialisms | colonialists |
| colonialized | colonializes | colonialness |
| colonisation | colonization | colorcasting |
| colorfulness | colorimeters | colorimetric |
| colorization | ||
Note: These 13 12-letter words that start with 'colo' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with color, colon, colos, colog, coloc, colou, colob, colop, colom, colot.
5-letter words start with 'colo' (3)