floating bridge

English Thesaurus

1. a temporary bridge built over a series of pontoons (noun.artifact)

hypernym	:	bridge, span,
definition	:	a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc. (noun.artifact)

part holonym	:	pontoon,
definition	:	(nautical) a floating structure (as a flat-bottomed boat) that serves as a dock or to support a bridge (noun.artifact)