We don't have synonyms for overread yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are overload, overhead and overreach.
(v) :
(ambitransitive) To interpret something to a greater degree, or in a more positive way, than appropriate; read in too much depth; overinterpret; overanalyze.
(v) :
(ambitransitive) To interpret something to a greater degree, or in a more positive way, than appropriate; read in too much depth; overinterpret; overanalyze.