ladder

noun 0.667

ladderway

noun 0.643

scaling ladder

noun 0.618

laddering

noun 0.589

accommodation ladder

noun 0.583

ladder logic

noun 0.574

ladderback

noun 0.567

lock gate

noun 0.555

companion ladder

noun 0.553

aerial ladder

noun 0.552

sluiceway

noun 0.550

escalator

noun 0.538

spillway

noun 0.534

hydroelectric dam

noun 0.531

waterfall

noun 0.529

mill dam

noun 0.524

sluice

noun 0.518

staircase

noun 0.515

stairstep

noun 0.508

tailrace

noun 0.508

fish cage

noun 0.502

slipway

noun 0.502

stair

noun 0.500