Synonyms for (verb) back up
Definition: establish as valid or genuine
Usage: Can you back up your claims?
Definition: establish or strengthen as with new evidence or facts
Usage: his story confirmed my doubts; The evidence supports the defendant
Definition: become or cause to become obstructed
Usage: The leaves clog our drains in the Fall; The water pipe is backed up
Definition: block passage through
Usage: obstruct the path
Synonyms: back up
Definition: make a copy of (a computer file) especially for storage in another place as a security copy
Usage: You'd better back up these files!
Definition: make a replica of
Usage: copy that drawing; re-create a picture by Rembrandt
Definition: move backwards from a certain position
Usage: The bully had to back down