different between compactin vs compaction

English

compact +? -in?

compactin (uncountable)

compactin

From Old French compaction, from Latin compactionem, from compingere.

compaction (countable and uncountable, plural compactions)

The process of compacting something, or something that has been compacted.
- 2009, Hilary Mantel, Wolf Hall, Fourth Estate 2010, p. 480:
  At Smithfield Frith is being shovelled up, his youth, his grace, his learning and his beauty: a compaction of mud, grease, charred bone.

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