What is another word for "technicality"?

Roget's Thesaurus (1911) lists these synonyms for "technicality": abuse, accent, act, ambiguity, anagram, antiphrasis, archaic, archaism, argot, babu, barbarism, black, brogue, broken, byword, call, canon, cant, charge, clinch, code, coin, coiner, colloquial, colloquialism, command, confusion, corpus, corruption, dialect, direction, dog, double, expression, figure, flash, form, formula, formulary, gibberish.