1. Supersedure.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• supression,
• aupersession,
• zupersession,
• xupersession,
• dupersession,
• eupersession,
• wupersession,
• sypersession,
• shpersession,
• sjpersession,
• sipersession,
• s8persession,
• s7persession,
• suppersession,
• supercession,
• suppression,
• supersensibe,
• supersecriton,
• supersessen,
• supercsession

• supersonic,
• superstition,
• superclass,
• supersensitive,
• superstring,
• supersensitised,
• supergrass,
• superscribe,
• supersedure,
• supersede,
• suppressive,
• supersensitized,
• superscript,
• superscription,
• subversion,
• suppression.

The adjective form of the word "supersession" is "supersessive".

The plural of the "supersession" can be the "supersessions".

The singular of the "supersession" can be the "supersession".