We don't have synonyms for duckboard yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are backboard, buckboard and duckboards.
(n) :
One of a long series of boards laid from side to side as a path across wet or muddy ground; normally used in plural.
(n) :
Wooden, low walkway or short part of a path with one or more planks, logs, or boards laid after each other lengthwise, often two planks wide.
(n) :
A panel of wooden slats typically laid on a concrete floor in a workshop, to reduce fatigue for a person operating a machine tool or working at a bench.
(n) :
One of a long series of boards laid from side to side as a path across wet or muddy ground; normally used in plural.
(n) :
Wooden, low walkway or short part of a path with one or more planks, logs, or boards laid after each other lengthwise, often two planks wide.
(n) :
A panel of wooden slats typically laid on a concrete floor in a workshop, to reduce fatigue for a person operating a machine tool or working at a bench.