wellhead

English Thesaurus

1. a structure built over a well (noun.artifact)

hypernym	:	construction, structure,
definition	:	a thing constructed; a complex entity constructed of many parts (noun.artifact)

2. the source of water for a well (noun.location)

hypernym	:	beginning, origin, root, rootage, source,
definition	:	the place where something begins, where it springs into being (noun.location)