1. (noun) minimal (or marginal) resources for subsisting

• bread and butter
• keep
• livelihood
• living
• support
• sustenance

2. (noun) a means of surviving

• endurance
• survival

3. (noun) the state of existing in reality; having substance

• being
• beingness
• existence

1. (noun) a means of surviving

• exist
• live
• subsist
• survive