1. That which makes acid.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• sauing,
• suring,
• sourting,
• sobing,
• soing,
• sourceing,
• juring,
• seuring,
• someing,
• mouring,
• sring,
• sahring,
• ouring,
• somming,
• saring,
• souding,
• sturing,
• loring,
• souting,
• snooring

• sorriness,
• sourness,
• soreness,
• soaring,
• sorrowing,
• Sorenson,
• sorensen.

The adjective form of the word "souring" is "sour".

The plural of the "souring" can be the "sourings".

The singular of the "souring" can be the "souring".