different between dementation vs cementation

English

dement +? -ation?

dementation (uncountable)

(archaic) The act of depriving of reason; madness.
- 1654, Richard Whitlock, Zootomia; Or, Observations on the Present Manners of the English
  […] and so they aver to be drunk, or accessory to anothers Distemper (especially supposing the Distemper under command from breaking out into any other sins besides its own dementation, or stupidity) to be a lesse sin, than to call one Drunkard, on the bare sight of him in a Distemper, or but one slender Information.

cement +? -ation

cementation (countable and uncountable, plural cementations)

The act of cementing
(metallurgy) The impregnation of the surface of a metal with another material; the manufacture of steel by carburizing iron
(geology) The precipitation of mineral matter in the pores of a sediment
(medicine) The use of a cement join the parts of a broken bone to aid in the healing process
(dentistry) The use of a cement or adhesive to fasten orthodontics or to restore chipped or broken teeth

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