We don't have synonyms for triple blind yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are triple bond.
(adj) :
Alternative form of triple-blind. [Describing an experiment (usually medical) in which some information which might influence the experiment is withheld from three different parties until the outcome of the experiment is known: most commonly, the three parties are the subjects, the administrators, and the statisticians analysing the data.]
(adj) :
Alternative form of triple-blind. [Describing an experiment (usually medical) in which some information which might influence the experiment is withheld from three different parties until the outcome of the experiment is known: most commonly, the three parties are the subjects, the administrators, and the statisticians analysing the data.]