gangway vs gangboard

gangway and gangboard both are nouns.

Word	Noun	Adjective	Verb	Adverb
gangway	Yes	No	No	No
gangboard	Yes	No	No	No

As nouns, gangway and gangboard are synonyms defined as:

gangway and gangboard: a temporary bridge for getting on and off a vessel at dockside

Other synonyms of gangway include gangplank.

gangway (noun)	gangboard (noun)
a temporary passageway of planks (as over mud on a building site)	a temporary bridge for getting on and off a vessel at dockside
a temporary bridge for getting on and off a vessel at dockside
passageway between seating areas as in an auditorium or passenger vehicle or between areas of shelves of goods as in stores