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

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v. Third-person singular simple present indicative form of prefabricate.

"The area also yielded further evidence for quarrying: trenches cut in the limestone to separate the blocks to be extracted laterally, and half-finished prefabricates (Halbfabrikaten) of sarcophagus lids and coffins."

prefabricated    prefabricates    prefabricating   

create    make    produce   

prefabrication    prefab    prefabricator