gangplank vs gangboard

gangplank and gangboard both are nouns.

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

As nouns, gangplank and gangboard are synonyms defined as:

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

Other synonyms of gangplank include gangway.

gangplank (noun)	gangboard (noun)
a temporary bridge for getting on and off a vessel at dockside	a temporary bridge for getting on and off a vessel at dockside