We don't have synonyms for take hostage yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are take stage.
(v) :
(transitive) To take custody or possession of a person as security for performance against a treaty, a pledge, or a demand, especially now an extra-legal demand; to take as hostage.
(v) :
(transitive) To take custody or possession of a person as security for performance against a treaty, a pledge, or a demand, especially now an extra-legal demand; to take as hostage.