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 coaming, especially all sides of a single coach roof, hatch, or cockpit.

noun-plural. Raised pieces of wood of iron around a hatchway, skylight, or other opening in the deck, to prevent water from running bellow; esp. the fore-and-aft pieces of a hatchway frame as distinguished from the transverse head ledges.

"Each of these hatch-ways, or orifices, had the usual defences of "coamings," strong frame-work around their margins."

combings