The difference between Hedgehog and Hedgy-boar

Hedgehog as a noun:

A small mammal, of the family Erinaceidae or subfamily Erinaceinae (, the latter characterized by their spiny back and often by the habit of rolling up into a ball when attacked.)

Hedgehog as a noun (US):

Any of several spiny mammals, such as the porcupine, that are similar to the hedgehog.

Hedgehog as a noun:

A type of moveable military barricade made from crossed logs or steel bars, laced with barbed wire, used to damage or impede tanks and vehicles; Czech hedgehog.

Hedgehog as a noun (informal, military, historical):

A spigot mortar-type of depth charge weapon from World War II that simultaneously fires a number of explosives into the water to create a pattern of underwater explosions intended to attack submerged submarines.

Hedgehog as a noun (Australia):

A type of chocolate cake (or slice), somewhat similar to an American brownie.

Hedgehog as a noun:

A form of dredging machine.

Hedgehog as a noun:

Certain flowering plants with parts resembling a member of family Erinaceidae , the pods of which are armed with short spines. of South Africa.

Hedgehog as a noun:

A kind of electrical transformer with open magnetic circuit, the ends of the iron wire core being turned outward and presenting a bristling appearance.

Hedgehog as a noun:

A way of serving food at a party, consisting of a half melon or potato etc. with individual cocktail sticks of cheese and pineapple stuck into it.

Hedgehog as a verb (military):

To make use of a hedgehog barricade as a defensive maneuver.

Hedgehog as a verb:

To array with spiky projections like the quills of a hedgehog.

Hedgehog as a verb:

To curl up into a defensive ball.

Hedgy-boar as a noun (Devon, and, Cornwall, now, rare):

A hedgehog.