Irregular and Underground

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

Underground and irregular are semantically related. in unofficial topic. In some cases you can use "Underground" instead an adjective "Irregular", when it comes to topics like guerrilla.

Nearby Words: irregularity, irregularly

Underground adjective - Undertaken or done so as to escape being observed or known by others.

Irregular and underground are semantically related. Sometimes you can use "Irregular" instead an adjective "Underground".