deliberately, advisedly, purposely, designedly, by design, by choice, on purpose, intendedly, intendingly, purposefully, more...

unintentionally, accidentally, by mistake, inadvertently

malicious, deliberate, wanton, premeditated, calculated, contrived, planned, studied, more...

with purpose,   not coincidentally,   with a purpose,   for a purpose,   with the goal,   with the purpose,   with in mind,   not by accident,   all knowingly,   to do on purpose