preserveative ( synonym found)
Definition of preserveative:

°any agent, natural or artificial that acts to preserve, especially when added to food.
"Salt, sugar, and acid all act as preservatives when making pickles."
°tending to preserve.
"The curators took preservative actions to maintain the ancient collection."
Definition of preserveative:

°any agent, natural or artificial that acts to preserve, especially when added to food.
"Salt, sugar, and acid all act as preservatives when making pickles."
°tending to preserve.
"The curators took preservative actions to maintain the ancient collection."
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