Pier and Sidewalk

Pier noun - A structure used by boats and ships for taking on or landing cargo and passengers.

Sidewalk and pier are semantically related. In some cases you can use "Sidewalk" instead a noun "Pier".

Sidewalk noun - Walk consisting of a paved area for pedestrians; usually beside a street or roadway.

Pier and sidewalk are semantically related. Sometimes you can use "Pier" instead a noun "Sidewalk".