different between precipitation vs cementation

English

From Middle French précipitation, from Latin praecipit?ti?, praecipit?ti?nem.

precipitation (countable and uncountable, plural precipitations)

(meteorology) Any or all of the forms of water particles, whether liquid or solid, that fall from the upper atmosphere (e.g., rain, hail, snow or sleet). It is a major class of hydrometeor, but it is distinguished from cloud, fog, dew, rime, frost, etc., in that it must fall. It is distinguished from cloud and virga in that it must reach the ground.
- 2019, VOA Learning English (public domain)
  South Korea’s Ministry of Environment said in a news release that no major precipitation was observed after the cloud seeding operation.
A hurried headlong fall.
(countable, uncountable, chemistry) A reaction that leads to the formation of a heavier solid in a lighter liquid; the precipitate so formed at the bottom of the container.
(figuratively) Unwise or rash rapidity; sudden haste.
- 1933, Dorothy L. Sayers, Murder Must Advertise
  […] had acted with some precipitation and had probably started out upon a wild-goose chase.

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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