What is another word for Blow-hole?
Pronunciation: [blˈə͡ʊhˈə͡ʊl] (IPA) 
A blow-hole is a natural opening on the surface of the earth or on an animal's body that is used for the expulsion of air, water, or other substances. There are several synonyms for this term, including a vent, an air-hole, a breathing hole, a snorkel, a spout, and a blowpipe. These words are commonly used to describe openings in the ground, such as volcanic vents or geysers, as well as in marine wildlife, such as dolphins, whales, and seals. In addition, blow-holes can also refer to the openings in certain musical instruments, such as the bagpipes or the harmonica.
