monkey bridge vs fly bridge

monkey bridge and fly bridge both are nouns.

Word	Noun	Adjective	Verb	Adverb
monkey bridge	Yes	No	No	No
fly bridge	Yes	No	No	No

As nouns, monkey bridge and fly bridge are synonyms defined as:

monkey bridge and fly bridge: the highest navigational bridge on a ship; a small (often open) deck above the pilot house

Other synonyms of monkey bridge include flybridge, flying bridge.

monkey bridge (noun)	fly bridge (noun)
a high narrow platform above a deck or in an engine room or boiler room	the highest navigational bridge on a ship; a small (often open) deck above the pilot house
the highest navigational bridge on a ship; a small (often open) deck above the pilot house