As nouns the difference between dog and giraffe
is that
dog is a mammal,
Canis lupus familiaris, that has been domesticated for thousands of years, of highly variable appearance due to human breeding while
giraffe is a ruminant, of the genus
Giraffa, of the African savannah with long legs and highly elongated neck, which make it the tallest living animal; yellow fur patterned with dark spots, often in the form of a network; and two or more short, skin-covered horns.
As an acronym DOG
is digital on-screen graphic.
As a verb dog
is to pursue with the intent to catch.