Sustain is defined as to support something or to endure a trial or hardship.
To make firm; strengthen; establish; encourage
To assume and carry successfully, as the part of an actor; to represent or act; to sustain.
To set up (a government, nation, business, etc.); found; institute
To demonstrate the truth or accuracy of, as by the presentation of evidence:
To bear witness; give testimony:
To establish the truth of; verify
To cause to move backward or in a reverse direction:
To make binding under the law; give legal force to; declare legally valid
To refuse to accept, submit to, believe, or make use of:
To disclaim connection with, responsibility for, etc.; to refuse to acknowledge; to disown; to abjure; to disavow.
To prove to be false or erroneous; overthrow by argument or proof:
To speak in denial; oppose verbally
To buttress is to provide support for a building, or to provide support and justification for an argument or idea.
To make evident; indicate; show
(Law) To show an adequate reason for something done
To make a statement based on personal knowledge in support of an asserted fact; bear witness:
To guarantee (a product).
Demonstrate means to march or protest against something with a group.
Show is defined as to bring into view, teach, or display.
(Biol.) With the same inherited trait or traits as a parent; without variation
To declare positively; assert to be true:
To give support or substance to:
Find another word for corroborate. In this page you can discover 31 synonyms, antonyms, idiomatic expressions, and related words for corroborate, like: sustain, confirm, support, establish, bear out, approve, prove, verify, attest, authenticate and back.