Antonyms are words with opposite meanings. Occupation is a synonym (a word with a similar meaning) for career.
An antonym for rookie is veteran.
An antonym for propitiate is anger.
informal
Antonym to the word "Complete" is: Incomplete.
The antonym is unimpressive.
occupation
pizza
higher pay or contract for career and opposite for occupation
A music career
you will never now what her career was but if you look at her occupation it tells you that she is a novelist.
there classes
That is the correct spelling of "livelihood" (an occupation or career).
nature of occupation
Reeve is/was an occupation in feudal society, a kind of elected official. In modern times the closest equivalent might be mayor or possibly sheriff. I'm not sure it has an antonym.
lifework, profession, vocation, occupation, employment, art
He was a businessman, and he also managed her career for a while.
A chosen pursuit; a profession or occupation.