15-Letter Words Start with 'ast'

There are 5 15-letter words that start with 'ast'.

astrobiologists	astronautically
astrophotograph	astrophysically
astrophysicists

Note: These 5 15-letter words that start with 'ast' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with astr, asto, aste, asth, asti, asta, astu, asty.

5-letter words start with 'ast' (2)
6-letter words start with 'ast' (7)
7-letter words start with 'ast' (11)
8-letter words start with 'ast' (21)
9-letter words start with 'ast' (26)
10-letter words start with 'ast' (25)
11-letter words start with 'ast' (13)
12-letter words start with 'ast' (13)
13-letter words start with 'ast' (8)
14-letter words start with 'ast' (7)
15-letter words start with 'ast' (5)