pa vs daddy

pa and daddy both are nouns.

Word	Noun	Adjective	Verb	Adverb
pa	Yes	No	No	No
daddy	Yes	No	No	No

As nouns, pa and daddy are synonyms defined as:

pa and daddy: an informal term for a father; probably derived from baby talk

Other synonyms of pa include dad, dada, papa, pappa, pop.

pa (noun)	daddy (noun)
an informal term for a father; probably derived from baby talk	an informal term for a father; probably derived from baby talk