wellhead vs beginning

wellhead and beginning both are nouns.

Word	Noun	Adjective	Verb	Adverb
wellhead	Yes	No	No	No
beginning	Yes	Yes	No	No

As nouns, beginning is a hypernym of wellhead; that is, beginning is a word with a broader meaning than wellhead:

Other hypernyms of wellhead include origin, root, rootage, source.

wellhead (noun)	beginning (noun)
a structure built over a well	the act of starting something
the source of water for a well	the first part or section of something
	the event consisting of the start of something
	the place where something begins, where it springs into being
	the time at which something is supposed to begin

wellhead (adjective)	beginning (adjective)
	serving to begin