flybridge vs monkey bridge

flybridge and monkey bridge both are nouns.

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

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

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

Other synonyms of flybridge include fly bridge, flying bridge.

flybridge (noun)	monkey bridge (noun)
the highest navigational bridge on a ship; a small (often open) deck above the pilot house	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