doggie bag vs doggy bag

doggie bag and doggy bag both are nouns.

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

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

doggie bag and doggy 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

doggie bag (noun)	doggy 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