1. lifelong
I like to do oil painting, but I don't intend to make that my lifelong occupation.
lifelong ambition
The majority of people believe that marriage is a lifelong commitment.
She was a lifelong member of the Labour party.
And you will have the lifelong appreciation of a grateful president.
He was doomed to life-long poverty.
Lifelong education means perpetual retraining.
Working in the Kremlin has been my lifelong dream.
2. for life
The criminal has been sentenced for life.
Few people can count on having a job for life.
3. for a lifetime