This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Tending to preserve or capable of preserving.

n. Something used to preserve, especially a chemical added to foods to inhibit spoilage.

n. any agent, natural or artificial that acts to preserve, especially when added to food

adj. tending to preserve

adj. Having the power or quality of preserving; tending to preserve, or to keep from injury, decay, etc.

n. That which preserves, or has the power of preserving; a presevative agent.

Preserving; tending to keep safe, sound, or free from decay: as, the preservative quality of salt.

n. That which preserves; anything which tends to keep safe and sound, or free from injury, corruption, or decay; a preventive of damage, decomposition, or waste.

adj. tending or having the power to preserve

n. a chemical compound that is added to protect against decay or decomposition

"I have had some previous experience in this branch of what I call preservative chemistry, and I have already in some degree succeeded in attaining my object."

protective   

Conservative    conservative    neoconservative    ultraconservative   

curative    medicinal    anti-seize    nutritive    restorative    albuminous    preventive    antifungal    acid-free    resinous