different between trafficable vs trafficability

English

traffic +? -able

trafficable (comparative more trafficable, superlative most trafficable)

Able to be trafficked or traded; marketable.
- 1649, Joseph Hall, Resolutions and Decisions of Divers Practicall cases of Conscience
  Money itself is not only the price of all commodities in all civil nations, but it is also, in some cases, a trafficable commodity : the price whereof rises and falls, in several countries, upon occasion; and yieldeth either profit or loss
Having good trafficability: of a vehicle, able to traverse terrain; of terrain, able to support vehicle movement.

traffic +? -ability

trafficability (uncountable)

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