What is another word for b side?
Pronunciation: [bˈiː sˈa͡ɪd] (IPA) 
As a noun, "b side" typically refers to the lesser-known track on a vinyl record, while the more popular and commercially successful song is on the A side. In music slang, "b side" can be used to describe a musician's lesser-known work or a track that didn't make it onto an album. Synonyms for "b side" include "deep cut," "outtake," "bonus track," and "rarity." Depending on the context, other options might include "leftovers," "rejects," "cast-offs," or "b-sides and rarities," a term often used to describe a collection of lesser-known tracks released years after the fact.
