pontoon bridge vs bateau bridge

pontoon bridge and bateau bridge both are nouns.

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

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

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

Other synonyms of pontoon bridge include floating bridge.

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