We don't have synonyms for spenglerian yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are Spencerian and spenserian.
(adj) :
Of or relating to Oswald Spengler (1880–1936), German historian and philosopher of history, who postulated that human cultures and civilizations are akin to biological entities, with limited and predictable lifespans.
(adj) :
Of or relating to Oswald Spengler (1880–1936), German historian and philosopher of history, who postulated that human cultures and civilizations are akin to biological entities, with limited and predictable lifespans.