prefab

nouns

a prefabricated structure
prefab
is a type of (narrower)
a thing constructed; a complex entity constructed of many parts
"the structure consisted of a series of arches"; "she wore her hair in an amazing construction of whirls and ribbons"
construction, structure

adjectives

manufactured in standard sizes to be shipped and assembled elsewhere
"a pre structure"
prefab
is similar to
made for purchase and immediate use
ready-made