different between tractive vs practive

English

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.

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

practive (comparative more practive, superlative most practive)

(obsolete) Doing; active.
- 1608, Josuah Sylvester, Du Bartas his divine weekes and workes
  You take your Prisiner for a practive man

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