1. colloquial
2. surveillance
3. reunion

2017
1. observatory
2. agriculture
3. stewardess

2016
1. verbose
2. compound
3. hapless

2015
1. exotic
2. drizzle
3. heroic

2014
1. stethoscope
2. persuadable
3. distinguish

2013
1. colloquial
2. surveillance
3. reunion