Abrogate vs. Supersede

Abrogate and Supersede Definitions
Abrogate
To abolish, do away with, or annul, especially by authority
"Our existing Aboriginal and treaty rights were now part of the supreme law of the land, and could not be abrogated or denied by any government" (Matthew Coon Come).
Supersede
To take the place of; replace or supplant
"[Dean] Acheson's conversion, that military force should supersede diplomatic response as the core of U.S. foreign policy, would reverberate across generations" (James Carroll).
Abrogate
To annul by an authoritative act; to abolish by the authority of the maker or her or his successor; to repeal; — applied to the repeal of laws, decrees, ordinances, the abolition of customs, etc.
Supersede
To take the place of (a person), as in an office or position; succeed.
Abrogate
(transitive) To put an end to; to do away with.
Supersede
(transitive) To take the place of.
Those older products have been superseded by our new range.
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Abrogate
To block a process or function.
Supersede
(transitive) To displace in favour of itself.
Modern US culture has superseded the native forms.
Abrogate
(archaic) Abrogated; abolished.
Supersede
(Internet) An updated newsgroup post that supersedes an earlier version.
Rogue cancels and supersedes are being issued on a large scale against posters.
Abrogate
Abrogated; abolished.
Supersede
To come, or be placed, in the room of; to replace.
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Abrogate
To annul by an authoritative act; to abolish by the authority of the maker or his successor; to repeal; - applied to the repeal of laws, decrees, ordinances, the abolition of customs, etc.
Let us see whether the New Testament abrogates what we so frequently see in the Old.
Whose laws, like those of the Medes and Persian, they can not alter or abrogate.
Supersede
To displace, or set aside, and put another in place of; as, to supersede an officer.
Abrogate
To put an end to; to do away with.
Supersede
To make void, inefficacious, or useless, by superior power, or by coming in the place of; to set aside; to render unnecessary; to suspend; to stay.
Nothing is supposed that can supersede the known laws of natural motion.
Abrogate
Revoke formally
Supersede
To omit; to forbear.
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Supersede
Take the place or move into the position of;
Smith replaced Miller as CEO after Miller left
The computer has supplanted the slide rule
Mary replaced Susan as the team's captain and the highest-ranked player in the school