speargun

As nouns the difference between speargun and speargun

is that speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use while speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use.

As nouns the difference between speargun and crossbow

is that speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use while crossbow is a mechanised weapon, based on the bow and arrow, which fires bolts.

As nouns the difference between speargun and railgun

is that speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use while railgun is an electromagnetic gun that uses a large electrical current for propelling a projectile down a track of two conductive rails.

As nouns the difference between speargun and bangstick

is that speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use while bangstick is a kind of underwater speargun used primarily against sharks.

As nouns the difference between underwater and speargun

is that underwater is underlying water or body of water, for example in an aquifer or the deep ocean while speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use.

As an adjective underwater

is (not comparable) beneath the surface of the water, or of or pertaining to the region beneath the water surface.

As an adverb underwater

is going beneath the surface of the water.

As a verb underwater

is (agriculture|horticulture) to water or irrigate insufficiently.

As a proper noun spear

is .

As a noun speargun is

a tube-shaped gun that fires a barbed spear, almost always for underwater use.

As nouns the difference between gun and speargun

is that gun is a device for projecting a hard object very forcefully; a firearm or cannon while speargun is a tube-shaped gun that fires a barbed spear, almost always for underwater use.

As a verb gun

is with “down” To shoot someone or something, usually with a firearm.