whitener

[ hwahyt-n-er, wahyt- ]
/ ˈʰwaɪt n ər, ˈwaɪt- /

noun

a preparation for making something white, as a bleach, dye, or polish: a bottle of shoe whitener.
a person or thing that whitens.
a person who applies whitener, as in a manufacturing process.

Origin of whitener

First recorded in 1605–15; whiten + -er1

British Dictionary definitions for whitener

whitener
/ (ˈwaɪtə) /

noun

a substance that makes something white or whiter
a powdered substitute for milk or cream, used in coffee or tea