There are 12 12-letter words that start with 'clo'.
| cloddishness | cloistresses | closemouthed |
| clotheshorse | clotheslined | clotheslines |
| clothespress | cloudberries | cloudinesses |
| cloverleaves | clownishness | cloxacillins |
Note: These 12 12-letter words that start with 'clo' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with clou, clos, clot, clon, clod, cloc, clow, cloa, clog, clov, cloi, clom, cloy, clob, clop, cloz, clof, cloo, cloq, clox.
4-letter words start with 'clo' (6)