There are 10 15-letter words that start with 'conf'.
| confectionaries | confectioneries | 
| confessionalism | confessionalist | 
| confidentiality | confidingnesses | 
| configurational | confirmednesses | 
| confraternities | confrontational | 
Note: These 10 15-letter words that start with 'conf' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with confi, confe, confo, confl, confu, confr, confa.
6-letter words start with 'conf' (3)