gangplank

As a noun gangplank

is (nautical) a board used as a temporary footbridge between a ship and a dockside.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between gangplank and escalator

is that gangplank is (nautical) a board used as a temporary footbridge between a ship and a dockside while escalator is a motor-driven mechanical device consisting of a continuous loop of steps that automatically conveys people from one floor to another.

In nautical terms the difference between gangplank and brow

is that gangplank is a board used as a temporary footbridge between a ship and a dockside while brow is the hinged part of a landing craft or ferry which is lowered to form a landing platform; a ramp.

As a verb brow is

to bound or limit; to be at, or form, the edge of.

In nautical terms the difference between gangplank and companionway

is that gangplank is a board used as a temporary footbridge between a ship and a dockside while companionway is a staircase or ladder from one deck to another on a ship.

As nouns the difference between taxonomy and gangplank

is that taxonomy is the science or the technique used to make a classification while gangplank is (nautical) a board used as a temporary footbridge between a ship and a dockside.