We don't have synonyms for think tanks yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are think tank, thinktank and think-tank.
(n) :
(idiomatic) A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.
(n) :
(idiomatic) A group of people who collectively perform research and develop reports and recommendations on topics relating to strategic planning or public policy, and which is usually funded by corporate, government, or special interests.