There are 28 11-letter words that start with 'overc'.
Note: These 28 11-letter words that start with 'overc' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with overco, overcl, overca, overcr, overch, overcu, overce, overci.
7-letter words start with 'overc' (2)