There are 11 14-letter words that start with 'conv'.
| convalescences | conventionally | 
| conventioneers | conversational | 
| conversaziones | convertaplanes | 
| convertibility | convertiplanes | 
| convincingness | convivialities | 
| convulsiveness | |
Note: These 11 14-letter words that start with 'conv' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with conve, convo, convi, convu, conva.
6-letter words start with 'conv' (3)