The word "devil bird" refers to a Sri Lankan bird species called "Ulama," known for its hauntingly loud and eerie cries. However, this bird is also associated with evil and is often considered a bad omen in local folklore. Synonyms for "devil bird" may include "nightjar" or "nighthawk," as these birds are also known for their distinct calls and their habit of hunting at night. Another possible synonym is "ghost bird," as the "devil bird" is thought to have supernatural powers. Alternatively, one could use the species name "Caprimulgus indicus" as a more formal, scientific term for this fascinating but unsettling bird.