We don't have synonyms for knocked out yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are knock out, knocked-out and knocked up.
(n) :
the act of making someone unconscious, or at least unable to come back on their feet within a certain period of time; a TKO; something wildly popular, entertaining, or funny
(n) :
the act of making someone unconscious, or at least unable to come back on their feet within a certain period of time; a TKO; something wildly popular, entertaining, or funny