Term: catchment: a structure in which water is collected (especially a natural drainage area)
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: putrefaction: a state of decay usually accompanied by an offensive odor
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: beam: long thick piece of wood or metal or concrete, etc., used in construction
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: tracery: decoration consisting of an open pattern of interlacing ribs
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: knockdown: a blow that knocks the opponent off his feet
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: tenor: the pitch range of the highest male voice
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: jezebel: a shameless impudent scheming woman
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: ally: a friendly nation
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: appeal board: a board of officials that are not judicial but are appointed to hear appeals
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: morning dress: a woman's informal dress for housework
Broader: structure: a thing constructed; a complex entity constructed of many parts | Unrelated: bookmobile: a van with shelves of books; serves as a mobile library or bookstore