What's the noun for antinomianism? Here's the word you're looking for.
antinomianism
(Christianity) A religious movement which believes that only the spiritual 'law of Faith' (Romans 3:27) is essential for salvation; and which is 'against' all other practical 'laws' being taught as being essential for salvation; and referring to them as legalism.
“Why should parents fund the moral decivilization of their children at the hands of tenured antinomians?”
“Liberals find it necessary to deny recurring suspicions that they are antinomians, moral relativists, and secularists set on removing religious values from the public square.”
“Antinomians will not yield it lawful to a believer to pray for remission of sins.”