Substandard and Uncharacteristic

Substandard adjective - Falling short of a standard.

Uncharacteristic and substandard are semantically related in abnormal topic. In some cases you can use "Uncharacteristic" instead an adjective "Substandard".

Uncharacteristic adjective - Distinctive and not typical.

Substandard and uncharacteristic are semantically related in abnormal topic. Sometimes you can use "Substandard" instead an adjective "Uncharacteristic".