enallage

plural enallages · alternative enallagy

1. countablerhetoricuncountableTransformation from one grammatically correct form to another.
2. countablerhetoricuncountableThe substitution of one grammatical form for another that violates a grammatical rule.

   And when all men shall have adopted this enallage, the fault indeed will be banished, or metamorphosed, but with it will go an other sixth part of every English conjugation.

   1851, Goold Brown, The Grammar of English Grammars