We don't have synonyms for slip form yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are slipform, stipiform and flip for.
(N) :
Slip forming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is placed into a form that may be in continuous motion horizontally, or incrementally raised vertically.
(N) :
Slip forming, continuous poured, continuously formed, or slipform construction is a construction method in which concrete is placed into a form that may be in continuous motion horizontally, or incrementally raised vertically.