What's acute vs regular bronchitis?

Starting with "itis" That -itis in Medicalese only means "inflammation." It doesn't explain why. So, an "acute" bronchitis is a sudden inflammation of the bronchi, usually infectious, sometimes allergic. "Chronic" bronchitis is long-term, and is really referring to a form of COPD, the "blue bloater" type w/ mucus production vs. "pink puffer" emphysema. Asthma is sometimes also classified under the COPD umbrella term.