Difference between Obviate and Head Off

OBVIATE vs HEAD 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

Interdict, Face, Lead, Preclude, Prevent, Heads, Decapitate, Deflect, Obviate, Avoid, Stave off, Debar, Avert, Fend off, Ward off

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

Forestall, Stem, Lead, Interdict, Face, Preclude, Prevent, Decapitate, Deflect, Obviate, Avoid, Stave off, Debar, Avert, Fend off

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.

We want to make sure students start off on the right financial path as they head off to school.
Cafe Del Mar does look excellent, chilling watching the sun go down before you head off to get off your face in Amnesia.
Bob Hughes, the Head of the School of Law, will head off to Marshall Islands on Thursday 20th February for an.
That would head off some tax increases from those places and avoid laying off cops, firemen and teachers.
Alone on the Bus sprout rockets and head off into Space and their map Gets off.
Many of our occupants start their day off with a workout in the Fitness Center and then head off to work.
With all the head bolts removed, pull the head off the block.
Big fish gobble baits and head off as the sinker either pulls free of its coral or breaks off.
I am pretty much finished off after my long day and head off early to bed.
Get the fuck off her or I will blow your fucking head off!