calling vs occupation

calling and occupation both are nouns.

Word	Noun	Adjective	Verb	Adverb
calling	Yes	No	No	No
occupation	Yes	No	No	No

As nouns, occupation is a hypernym of calling; that is, occupation is a word with a broader meaning than calling:

Other hypernyms of calling include business, job, line, line of work.

calling (noun)	occupation (noun)
the particular occupation for which you are trained	the principal activity in your life that you do to earn money
	the act of occupying or taking possession of a building
	the control of a country by military forces of a foreign power
	any activity that occupies a person's attention
	the period of time during which a place or position or nation is occupied