If it weren't for the 10 letter limit I could have kept going with educational.

Most of my play through relied on [stationed, stations, station, stated, state, stat, sat, as, I]

[Stationing, gestations] were my most common 10 letter words. 

Congratulations!  You are the first person to complete it.  If you have feedback or suggestions on how to improve it further, I’m all ears.