bow-wow vs doggy

bow-wow and doggy both are nouns.

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

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

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

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