Amended vs. Addended

Amended and Addended Definitions
Amended
To change for the better; improve
"The confinement appeared to have had very little effect in amending his conduct" (Horatio Alger).
Addended
Simple past tense and past participle of addend
Amended
To alter the wording of (a legal document, for example) so as to make more suitable or acceptable.
Addended
Furnished with an addendum
Amended
To enrich (soil), especially by mixing in organic matter or sand.
Addended
(organic chemistry) Furnished with an addend
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Amended
To better one's conduct; reform.
Amended
That has been modified from a previous form.
We voted on the amended bill, and it passed.
Amended
Simple past tense and past participle of amend
Amended
Of legislation
Amended
Modified for the better;
His amended ways