trench (noun) trench: ditch, channel dug in earth
Sinonime: arroyo, canal,
cut,
depression, dike,
drain,
drill, dugout, earthwork, entrenchment, excavation, fosse, foxhole,
furrow,
gorge, gulch, gully, gutter,
hollow,
main, moat,
pit, rut,
sink, trough,
tube, waterway