Tunnel

Noun

 * 1) An underground or underwater passage.
 * 2) A passage through or under some obstacle.
 * 3) A hole in the ground made by an animal, a burrow.

Verb

 * 1)  To make a tunnel through or under something, to burrow.
 * 2)  To make a tunnel.

Related terms

 * tunneller
 * tunnel vision
 * light at the end of the tunnel
 * wind tunnel

Adjectives for Tunnel
deep-level; brilliant; unsupported; signaled; clattering; hot; long; snowy; stuffy.

Verbs for Tunnel
blast—; blockade—; bore—; burrow—; drive—through; engineer—; gouge out—; guide through—; patrol—; project—; seal —; —couples; —facilitates; —gapes; — links; —pierces; —penetrates; —unites; — yawns.

Thesaurus
abri, access, adit, aisle, alley, ambulatory, antre, aperture, approach trench, arcade, artery, avenue, bore, bunker, burrow, cave, cavern, channel, cloister, colonnade, communication, communication trench, conduit, connection, corridor, couch, countermine, countersink, coupure, course, cove, covered way, covert, deepen, defile, delve, den, depress, dig, dig out, dike, ditch, dive, double sap, dredge, drill, drive, duct, dugout, earth, egress, entrance, entrenchment, excavate, exit, ferry, fire trench, flying sap, ford, form, fortified tunnel, fosse, foxhole, furrow, gallery, gouge, gouge out, groove, grot, grotto, grub, hole, ingress, inlet, interchange, intersection, junction, lair, lane, lodge, lower, mew, mine, moat, opening, outlet, overpass, parallel, pass, passage, passageway, penetrate, portico, quarry, railroad tunnel, run, sap, scoop, scoop out, scrabble, scrape, scratch, sewer, shaft, shovel, sink, slit trench, spade, subterrane, subway, traject, trajet, trench, trough, troughing, troughway, underpass, warren, way