different between tractiveness vs tractive

English

tractive +? -ness

tractiveness (uncountable)

tractive (not comparable)

Pertaining to traction.
This locomotive develops 130,000 pounds of tractive effort.
- 1912, Flight [1]
  The outer third of the wing of a vulture consists of the wing tips. The inner two-thirds of the wing are cambered (when the wing is extended), and are concerned with lifting effort in unsoarable air and with lifting and tractive effort in soarable air.

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