Sustain synonyms such as authenticate, assist, bear, experience, bolster up, approve, and attest to. Sustain is a verb, and its antonyms are torment and plague. Additionally, here are 89 synonyms and nearby words for sustain as well as words beginning with S, Su, Sus, Sust, and Susta.
89 synonyms for sustain
1. encourage
be a source of strength to
be a tower of strength to
buck up
buoy up
carry
cheer up
comfort
give strength to
hearten
see someone through
succour
2. stand
bolster
buttress
carry
keep up
prop up
shore up
stand
underpin
3. suffer
endure
go through
undergo
3. maintain
bolster up
carry on
ceaseless
conserve
continual
continue
continuing
extend
incessant
keep
keep alive
keep going
keep in existence
keep up
never-ending
non-stop
perpetual
perpetuate
preserve
prolong
prolonged
prop up
protract
retain
round the clock
unabating
unbroken
unceasing
unending
unfaltering
unrelenting
unrelieved
unremitting
4. ratify
approve
attest to
authenticate
back up
bear out
confirm
corroborate
endorse
justify
ratify
substantiate
uphold
validate
verify
vindicate