bow-wow vs doggie

bow-wow and doggie both are nouns.

Word	Noun	Adjective	Verb	Adverb
bow-wow	Yes	No	No	No
doggie	Yes	No	No	No

As nouns, bow-wow and doggie are synonyms defined as:

Other synonyms of bow-wow include barker, doggy, pooch.

bow-wow (noun)	doggie (noun)
informal terms for dogs	informal terms for dogs
the bark of a dog