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

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n. Agent noun of shield: one who shields.

n. One who shields, protects, or shelters.

n. a person who cares for persons or property

"MacIlwaine knew so much of the private lives of community figures, then had not he, her husband and protector and shielder, planted in"

preserver   

firefighter    reminder    steward    fire-eater    chaperone    law officer    peace officer    custodian    guard    lawman