songster vs ballad maker

songster and ballad maker both are nouns.

Word	Noun	Adjective	Verb	Adverb
songster	Yes	No	No	No
ballad maker	Yes	No	No	No

As nouns, songster and ballad maker are synonyms defined as:

songster and ballad maker: a composer of words or music for popular songs

Other synonyms of songster include songwriter.

songster (noun)	ballad maker (noun)
any bird having a musical call	a composer of words or music for popular songs
a person who sings with skill
a composer of words or music for popular songs