calling vs vocation

calling and vocation both are nouns.

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

As nouns, calling and vocation are synonyms defined as:

calling and vocation: the particular occupation for which you are trained

Other synonyms of calling include career.

calling (noun)	vocation (noun)
the particular occupation for which you are trained	the particular occupation for which you are trained
	a body of people doing the same kind of work