As nouns the difference between songster and singster
is that songster is a man who sings songs, especially as a profession; a male singer while singster is a songstress.
songster
English
Noun
(
en noun)
A man who sings songs, especially as a profession; a male singer.
A male songbird.
(formal) One who writes songs.
(US) A book of songs; songbook.