With "fertility" I had in mind: EARTH, SATURN, WORM, and RABBIT. I picked "fertility" over "fertile" because of SATURN, but should have picked "fertile" probably for the worm, as in "The Formation of Vegetable Mould through the Action of Worms, with Observations on their Habits". As Egork, I completely overlooked CYCLE.
"Gunpowder" was clue to FORCE, COMPOUND and LONDON. I hoped to cover TRUNK and WORM with "pliable". I saw the looming threat of the PIPE bomb, especially after
Alan Rickman's passing away, but did not see any better way to clear the board in three turns (team Red would definitely have won within four).