Difference between Obviate and Ward Off

OBVIATE vs WARD OFF: VERB

To bypass a requirement or make it unnecessary; to avoid a future problem or difficult situation.
Do away with
Prevent the occurrence of; prevent from happening

To anticipate; to prevent by interception; to remove from the way or path; to make unnecessary.
To meet in the way.
To keep from happening or render unnecessary. : prevent.

To meet.
To meet half-way, as difficulties or objections; hence, to meet and dispose of; clear out of the way; remove.
Get rid of something
Prevent the occurrence of
Prevent from happening

Circumvent, Sidestep, Prevent, Alleviate, Preclude, Head off, Ward off, Rid of, Fend off, Debar, Deflect, Stave off, Avert, Avoid, Eliminate

Remedy, Avoiding, Counteract, Circumvent, Sidestep, Prevent, Preclude, Rid of, Fend off, Debar, Deflect, Stave off, Avert, Avoid, Eliminate

This, of course, would obviate the rule in MBM Fin.
Do these considerations obviate any UN role in such negotiations?
Care must be taken in reassembly to obviate oil leaks.
SYN: Remove, displace, obviate, oust, recal, neutralize, overrule, suspend, supplant.
Knowledge of the future does not obviate free will.
English does not obviate the need for other languages.
This question helps obviate thematic vagabonding and tunnel vision.
Effective use of rhetorical questions may obviate this problem.
Catalina will obviate the need for an antivirus utility.
Family Services that Obviate Need for Child Placement.