Groundhog
Part of speech: noun
Definition: A red-brown marmot, Marmota monax, native to North America.
Hedgehog
Part of speech: noun
Definition: Small mammal characterized by its spiny back and by its habit of rolling itself into a ball when attacked.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.The nickname for a type of depth charge weapon that simultaneously fires a number of explosives into the water to create a pattern of underwater explosions intended to attack submerged enemies.A type of chocolate cake (or slice), somewhat similar to an American brownie.
Example sentence: When I was really little, we used to play Sega Genesis, and my older brother would play 'Sonic The Hedgehog 2,' and he'd be playing as Sonic, but he'd leave an unplugged controller for me to play with, and the whole time I thought I was playing as Tails.