What is another word for "idiotism"?

Roget's Thesaurus (1911) lists these synonyms for "idiotism": arrange, call, card, circumlocution, clothe, couch, denominate, designate, dub, express, expression, figure, find, give, good, idiom, idiomatic, into, motto, paragraph, paraphrase, periphrase, phrase, phraseology, proverb, put, round, sentence, set, speak, speech, style, synonym, the, turn, voice, word.