bread
to live on bread and cheese

charity
to live on charity

enough
to have enough to live on

fat
...to live on the fat of the land / to live off the fat of the land

income
to live on one's income

live on
to live on hope

modicum
to live on a very small modicum

nothing
to live on next to nothing

on
to live on

pension
to live on a pension

shift
to live on shifts