We don't have synonyms for double-take yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are double take, doubletake and double-talk.
(n) :
Alternative form of double take. [An abrupt movement, used, for example, as a comical reaction to a surprising sight, in which someone casually sees something, briefly stops looking at it, realizes what it is, and snaps attention back to it with an expression of surprise or disbelief.]
(n) :
Alternative form of double take. [An abrupt movement, used, for example, as a comical reaction to a surprising sight, in which someone casually sees something, briefly stops looking at it, realizes what it is, and snaps attention back to it with an expression of surprise or disbelief.]