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

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n. Plural form of wader.

n. Waterproof boots that cover the whole leg and hips, and sometimes the chest; worn by anglers.

n. waterproof hip boots (sometimes extending to the chest) worn by anglers

"Fishing off a boat and in a pair of waders is as "extreme" as it gets for me."

hip boot    thigh boot   

blockaders    crusaders    evaders    graders    invaders