The terms are not mutually exclusive: * You can be both a democracy and a constitutional republic (India, USA) * You can be a democracy but not a republic (UK

The terms are not mutually exclusive: * You can be both a democracy and a constitutional republic (India, USA) * You can be a democracy but not a republic (UK) * You can be a constitutional republic but not a democracy (China) * You can be neither a republic nor a democracy (monarchies through history)