vocation vs calling

vocation and calling both are nouns.

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

As nouns, vocation and calling are synonyms defined as:

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

Other synonyms of vocation include career.

vocation (noun)	calling (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