We don't have synonyms for screw piles yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are screw pile, screw pines and screw pine.
(N) :
Screw piles, sometimes referred to as screw-piles, screw piers, screw anchors, screw foundations, ground screws, helical piles, helical piers, or helical anchors are a steel screw-in piling and ground anchoring system used for building deep foundations.
(N) :
Screw piles, sometimes referred to as screw-piles, screw piers, screw anchors, screw foundations, ground screws, helical piles, helical piers, or helical anchors are a steel screw-in piling and ground anchoring system used for building deep foundations.