Thesaurus
Synonyms & Antonyms of back (up)
(Entry 1 of 3)
1
as in testify (to), vouch (for)
Synonyms & Near Synonyms for back (up)
Antonyms & Near Antonyms for back (up)
backup
nounSynonyms of backup (Entry 2 of 3)
1
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 for backup
Words Related to backup
2
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 for backup
Words Related to backup
backup
adjectiveSynonyms & Antonyms of backup (Entry 3 of 3)
as in alternate, proxy
Synonyms & Near Synonyms for backup
Antonyms & Near Antonyms for backup
Test Your Vocabulary
Odd Habits and Quirks
-
- Which of the following best describes an easily irritated person?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
A daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Share back (up)
Time Traveler for back (up)
The first known use of back (up) was in 1801
See more words from the same year