CMV esophagitis
HSV esophagitis
Diphtheria (C. diptheriae)
Pill esophagitis (bisphosphonates, NSAIDs, potassium chloride, iron supplements)
Post-radiation esophagutis
Mallory Weiss tear or Boerhaave syndrome
Cardiac pain (ACS, pericarditis, myocarditis, dissection, etc.)
Zenker's diverticulum
Candidiasis
CMV esophagitis
Otomycosis
HSV esophagitis
Sporotrichosis
Diphtheria 
Histoplasmosis
Pill esophagitis 