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Whitener (Noun)

An agent that makes things white or colorless.

Nouns denoting substances.

Bleach is a common whitener used in laundry to remove tough stains and brighten clothes.
The whitener in this toothpaste helps to gently remove surface stains and leave your teeth looking their best.
The brand manager instructed the marketing team to emphasize the new detergent's whitener, which they claimed was stronger than other leading brands.
The cleaning solution contained a whitener that helped to remove stubborn scuff marks from the kitchen floor.
A specialized whitener was used in the processing of sugar to remove impurities and result in a pure white product.