Term: main: a principal pipe in a system that distributes water or gas or electricity or that collects sewage
Broader: physical entity: an entity that has physical existence | Unrelated: union jack: national flag of the United Kingdom
Broader: physical entity: an entity that has physical existence | Unrelated: accession: a process of increasing by addition (as to a collection or group)
Broader: physical entity: an entity that has physical existence | Unrelated: oneness: the quality of being united into one
Broader: physical entity: an entity that has physical existence | Unrelated: old boy: a vivacious elderly man
Broader: physical entity: an entity that has physical existence | Unrelated: cocoa plum: plum-shaped whitish to almost black fruit used for preserves; tropical American
Broader: physical entity: an entity that has physical existence | Unrelated: sapodilla: tropical fruit with a rough brownish skin and very sweet brownish pulp
Broader: physical entity: an entity that has physical existence | Unrelated: ring girl: a young woman who holds up cards indicating the number of the next round at prize fights
Broader: physical entity: an entity that has physical existence | Unrelated: glop: any gummy shapeless matter; usually unpleasant
Broader: physical entity: an entity that has physical existence | Unrelated: sorus: a spore-producing structure in certain lichens and fungi
Broader: physical entity: an entity that has physical existence | Unrelated: anguillidae: eels that live in fresh water as adults but return to the sea to spawn