(1) Warfighter/Warfighting (apparently Lossie recently had a Warfighters Awards Dinner ?).
(2) Kill Chain (apparently comes from the new RPAS World ?).
(3) Synthetic Training (is that the same as training in a sim ?).
1 - Yes, the US like to use 'Warfighter' for every military man and woman. They coined the term (?) so they can use it as much as they like I guess.
2 - Kill Chain was used long before RPAS were in. It is basically Sensor-to Shooter (-to-Effects) - yes, another naff term I hear you cry, but all common sense nonetheless.
3 - Synthetic Training could also be simulated 'entities' generated on a radar scope or tactical situation display, used to provide training when other real systems are not available. It saves money without any potentially appreciable loss in training value.....but it has to be done correctly.