15-Letter Words Start with 'sep'

There are 3 15-letter words that start with 'sep'.

separablenesses	septendecillion
septuagenarians

Note: These 3 15-letter words that start with 'sep' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with sept, sepa, sepu, sepi, sepo, sepp, seps.

4-letter words start with 'sep' (1)
5-letter words start with 'sep' (6)
6-letter words start with 'sep' (9)
7-letter words start with 'sep' (8)
8-letter words start with 'sep' (12)
9-letter words start with 'sep' (17)
10-letter words start with 'sep' (21)
11-letter words start with 'sep' (11)
12-letter words start with 'sep' (7)
13-letter words start with 'sep' (3)
14-letter words start with 'sep' (4)
15-letter words start with 'sep' (3)