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 clapboard.

"The clapboards were a foot wide, evidently fashioned with care and beaded on the edges."

clapboarded    clapboarding    clapboards   

siding    cover   

weatherboard    clapper board    clapstick   

fieldstone    tumble-down    single-story    thatch-roofed    four-story