We don't have synonyms for epineuriums yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are epineurium.
(n) :
(anatomy) The connective tissue framework and sheath of a nerve which bind together the nerve bundles, each of which has its own special sheath, or perineurium; The outermost layer of dense irregular connective tissue surrounding a peripheral nerve.
(n) :
(anatomy) The connective tissue framework and sheath of a nerve which bind together the nerve bundles, each of which has its own special sheath, or perineurium; The outermost layer of dense irregular connective tissue surrounding a peripheral nerve.