floating bridge vs bateau bridge

floating bridge and bateau bridge both are nouns.

Word	Noun	Adjective	Verb	Adverb
floating bridge	Yes	No	No	No
bateau bridge	Yes	No	No	No

As nouns, floating bridge and bateau bridge are synonyms defined as:

floating bridge and bateau bridge: a temporary bridge built over a series of pontoons

Other synonyms of floating bridge include pontoon bridge.

floating bridge (noun)	bateau bridge (noun)
a temporary bridge built over a series of pontoons	a temporary bridge built over a series of pontoons