Authenticate, assist, bear, experience, bolster up, approve, and attest to are all synonyms for sustain. Torment and plague are these antonyms of sustain. And here are another 89 synonyms for sustain.
Sustain Synonyms
1. encourage
- Assist
- Be a source of strength to
- Be a tower of strength to
- Buoy up
- Carry
- Cheer up
- Comfort
- Encourage
- Give strength to
- Hearten
- Help
- See someone through
- Succour
- Support
- Buck up
2. stand
- Bear
- Bolster
- Carry
- Keep up
- Prop up
- Shore up
- Stand
- Support
- Underpin
- Buttress
3. suffer
- Experience
- Go through
- Suffer
- Undergo
- Endure
3. maintain
- Bolster up
- Carry on
- Ceaseless
- Conserve
- Constant
- Continual
- Continue
- Continuing
- Continuous
- Extend
- Incessant
- Keep alive
- Keep going
- Keep in existence
- Keep up
- Keep
- Maintain
- Never-ending
- Non-stop
- Ongoing
- Perpetual
- Perpetuate
- Persistent
- Preserve
- Prolong
- Prolonged
- Prop up
- Protract
- Relentless
- Retain
- Running
- Steady
- Unabating
- Unbroken
- Unceasing
- Unending
- Unfaltering
- Unrelenting
- Unrelieved
- Unremitting
- Round the clock
4. ratify
- Approve
- Attest to
- Authenticate
- Back up
- Bear out
- Confirm
- Corroborate
- Endorse
- Evidence
- Prove
- Ratify
- Substantiate
- Uphold
- Validate
- Verify
- Vindicate
- Justify