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

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adj. comparative form of spare: more spare

n. One who spares.

n. One who spares, or avoids unnecessary expense; a frugal spender.

n. That which spares; specifically, in metabolism, a substance which through its own destruction will curtail the destruction of other material: for example, carbohydrates are sparers of the tissue albumins.

n. someone who refrains from injuring or destroying

"If The City and the City marked a new direction, with a sparer prose and a more sombre tone, Kraken, published shortly after, "felt like the end of something"."

benefactor    helper