1. North American subspecies of tundra swan having a soft whistling note
   - whistling swan

Type of: Cygnus columbianus, tundra swan

• executive secretary
• executive session
• executive vice president
• executor
• executor-heir relation
• executorial
• executory
• executrix
• exedra
• exegesis
• exegete
• exegetic
• exegetical
• exemplar
• exemplarily
• exemplarity
• exemplary
• exemplary damages
• exemplification
• exemplify
• exemplifying
• exempt
• exemption
• exenterate
• exenteration