A-side 
noun
The side of a pop single regarded as the main one.The double A-side single Young Man is currently out on promo....
- I wanted to make an album that didn't have any throw away tracks on it… where every piece is a potential A-side single.
- I also like the idea of recording songs in pairs and putting them out as double A-sides.
- white squadron
- white squall
- white squill
- white squire
- white staff
- white steenbras
- White's thrush
- white stick
- white stock
- white stocking
- Whitestone
- white straits
- white straw
- white strawberry
- White's tree frog
- white stuff
- white sturgeon
- white sugar
- White Sulphur Springs
- White Sunday
- white supremacism
- white supremacist
- panophthalmitis
- panoplia
- panoplied