Unit construction refers to the process of creating a single entity by assembling different components. It can be used in various fields, such as construction, manufacturing, and engineering. There are several synonyms for the word "unit construction," including modular construction, prefabrication, and system building. Modular construction involves creating a building or structure by assembling pre-built modules. Prefabrication involves constructing components off-site and assembling them on-site. System building involves building structures using a system of standardized components. All of these synonyms for unit construction involve assembling pre-built parts, which can lead to faster and more efficient construction.