Term: envelope: a flat (usually rectangular) container for a letter, thin package, etc.
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: achievability: the state of being achievable
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: heat exhaustion: a condition marked by dizziness and nausea and weakness caused by depletion of body fluids and electrolytes
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: whitewash: a specious or deceptive clearing that attempts to gloss over failings and defects
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: southern crab apple: small tree or shrub of southeastern United States; cultivated as an ornamental for its rose-colored blossoms
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: bee balm: perennial herb of North America
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: mergus: mergansers
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: styrene: a colorless oily liquid; the monomer for polystyrene
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: bohrium: a transuranic element
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: pepper shrub: evergreen shrub or small tree whose foliage is conspicuously blotched with red and yellow and having small black fruits
Broader: container: any object that can be used to hold things (especially a large metal boxlike object of standardized dimensions that can be loaded from one form of transport to another) | Unrelated: canine distemper: a viral disease of young dogs characterized by high fever and respiratory inflammation