15-Letter Words Start with 'at'

There are 8 15-letter words that start with 'at'.

atheroscleroses	atherosclerosis
atherosclerotic	atmospherically
atrabiliousness	atrociousnesses
attainabilities	attentivenesses

Note: These 8 15-letter words that start with 'at' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with att, ato, ath, ata, atr, ate, atm, atl, aty, atw, ati.

3-letter words start with 'at' (2)
4-letter words start with 'at' (5)
5-letter words start with 'at' (16)
6-letter words start with 'at' (34)
7-letter words start with 'at' (56)
8-letter words start with 'at' (73)
9-letter words start with 'at' (79)
10-letter words start with 'at' (44)
11-letter words start with 'at' (38)
12-letter words start with 'at' (17)
13-letter words start with 'at' (18)
14-letter words start with 'at' (3)
15-letter words start with 'at' (8)