doggy bag vs doggie bag

doggy bag and doggie bag both are nouns.

Word	Noun	Adjective	Verb	Adverb
doggy bag	Yes	No	No	No
doggie bag	Yes	No	No	No

As nouns, doggy bag and doggie bag are synonyms defined as:

doggy bag and doggie bag: a bag for food that a customer did not eat at a restaurant; the transparent pretense is that the food is taken home to feed the customer's dog

doggy bag (noun)	doggie bag (noun)
a bag for food that a customer did not eat at a restaurant; the transparent pretense is that the food is taken home to feed the customer's dog	a bag for food that a customer did not eat at a restaurant; the transparent pretense is that the food is taken home to feed the customer's dog