We don't have synonyms for ergatives yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ergative, ergatively and negatives.
(adj) :
(grammar) With the subject of a transitive construction having grammatical cases or thematic relations different from those of an intransitive construction.
(n) :
(grammar) An ergative verb or other expression.
(n) :
(grammar) Ellipsis of ergative case (“a grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages”). [(grammar) A grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages.]
(adj) :
(grammar) With the subject of a transitive construction having grammatical cases or thematic relations different from those of an intransitive construction.
(n) :
(grammar) An ergative verb or other expression.
(n) :
(grammar) Ellipsis of ergative case (“a grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages”). [(grammar) A grammatical case used to indicate the agent of a transitive verb in ergative-absolutive languages.]