2 Verbs to Use for the Word ambushment

They would blunder down the pitch into the arroyo, perhaps glancing back, fearful of pursuit, but apprehending no ambushment.

Then he knew; saw it all as clearly as though he had witnessed itthe ambushment in the blinding sandstorm; the terror-stricken Waco; the frightened ponies; the lunging and swaying buckboard.

2 Verbs to Use for the Word  ambushment