back (up) 1 of 3
verb
1
as in to bear out
Synonyms & Similar Words
Relevance
- bear out
- testify (to)
- vouch (for)
- witness
- verify
- validate
- corroborate
- vindicate
- confirm
- authenticate
- certify
- support
- attest
- argue
- substantiate
- avouch
- warrant
- guarantee
- affirm
- document
- aver
- avow
- assert
- reinforce
- prove
- declare
- profess
- establish
- reenforce
- demonstrate
Antonyms & Near Antonyms
- disprove
- refute
- contradict
- rebut
- deny
- challenge
- contest
- dispute
- question
- disavow
- gainsay
- disclaim
2
as in to gel
Synonyms & Similar Words
- gel
- harden
- coagulate
- clot
- set
- congeal
Antonyms & Near Antonyms
- flow
- run
- stream
- pour
- arise
- roll
- issue
- race
- course
- spring
- disembogue
- emanate
- rush
- effuse
backup
2 of 3noun
1
as in jam
a crowded mass (as of cars) that impedes or blocks movement there was the inevitable backup of travelers trying to pass through airport security Synonyms & Similar Words
- jam
- tailback
- bottleneck
- jam-up
- congestion
- lock
- snarl
- traffic
- delay
- tangle
- stoppage
- logjam
- slowdown
- gridlock
- crawl
- tie-up
2
as in replacement
a person or thing that takes the place of another you didn't get the lead position, but you can be the backup to the chosen singer Synonyms & Similar Words
- replacement
- substitute
- assistant
- surrogate
- reserve
- pinch hitter
- fill-in
- sub
- relief
- alternate
- designated hitter
- cover
- proxy
- locum tenens
- stand-in
- deputy
- delegate
- second
- makeshift
- understudy
- stopgap
- attorney
- agent
- rep
- successor
- assignee
- apology
- representative
- factor
- reliever
- commissary
- envoy
- superseder
- procurator
backup
3 of 3adjective
as in stopgap
Synonyms & Similar Words
- stopgap
- makeshift
- substitute
- proxy
- alternate
- acting
- make-do
- interim
- temporary
- ad interim
- provisional
- jackleg
- provisory
- provisionary
Antonyms & Near Antonyms
- permanent
- long-term