Irregular and Open to question

Irregular adjective - Departing from some accepted standard of what is normal.

Open to question and irregular are semantically related In some cases you can use "Open to question" instead an adjective "Irregular".

Nearby Words: irregularity, irregularly

Irregular and open to question are semantically related in doubtful topic. Sometimes you can use "Irregular" instead an adjective phrase "Open to question".