living vs meal ticket

living and meal ticket both are nouns.

Word	Noun	Adjective	Verb	Adverb
living	Yes	Yes	No	No
meal ticket	Yes	No	No	No

As nouns, meal ticket is a hyponym of living; that is, meal ticket is a word with a more specific, narrower meaning than living:

Other hyponyms of living include amenities, comforts, conveniences, creature comforts, maintenance, subsistence.

living (noun)	meal ticket (noun)
the experience of being alive; the course of human events and activities	coupon redeemable at a restaurant and entitling the holder to a meal
people who are still living	a source of income or livelihood
the financial means whereby one lives
the condition of living or the state of being alive

living (adjective)	meal ticket (adjective)
pertaining to living persons
(informal) absolute
still in existence
(used of minerals or stone) in its natural state and place; not mined or quarried
true to life; lifelike
still in active use