Synonyms to trough

adit, access, admission, admittance, air lock, approach, channel, conduit, corridor, course, ditch, duct, egress, entrance, entranceway, entree, entry, entryway, exit, gangplank, gangway, hall, in, ingress, inlet, intake, means of access, opening, passage, passageway, trench, troughing, troughway, tunnel, vestibule, way, way in, aerospace, CAT, aerial, aerophysical, aerosphere, aerotechnical, air hole, air pocket, air-conscious, air-minded, air-wise, airsick, airspace, airworthy, aviational, bump, ceiling, crosswind, empty space, favorable wind, fog, front, head wind, high-pressure area, hole, ionosphere, jetstream, low-pressure area, overcast, pocket, roughness, soup, space, stratosphere, substratosphere, tail wind, tropopause, troposphere, turbulence, visibility, visibility zero, atmosphere, biosphere, ecosphere, gaseous envelope, lift, noosphere, stratosp