There are 12 11-letter words that start with 'bed'.
| bedarkening | bedchambers | bedcovering | 
| bedeafening | bedevilling | bedevilment | 
| bediapering | bedizenment | bedraggling | 
| bedrenching | bedriveling | bedrivelled | 
Note: These 12 11-letter words that start with 'bed' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with bedr, bede, bedi, beda, beds, bedu, bedw, bedc, bedl, bedd, bedp, bedf, bedb, bedm, bedt, bedo, bedg, bedq.
4-letter words start with 'bed' (2)