There are 10 13-letter words that start with 'cop'.
| coparcenaries | copartnership |
| copiousnesses | coplanarities |
| copolymerized | copolymerizes |
| coproductions | coprophiliacs |
| coproprietors | copyrightable |
Note: These 10 13-letter words that start with 'cop' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with copr, copy, copa, copp, copu, cope, copi, copo, copl, cops, copt.
4-letter words start with 'cop' (3)