different between paravane vs paravant

English

para- +? vane

paravane (plural paravanes)

(nautical) A device, stabilized with vanes, towed alongside a vessel such that the cable attaching it cuts the moorings of submerged mines.
(nautical) A towed underwater object with hydrofoils, of diverse uses.

From Middle French paravant, from par + avant.

paravant (not comparable)

(obsolete, rare) Pre-eminently; first. [16th-17th c.]
- 1596, Edmund Spenser, The Faerie Queene, VI.10:
  But that faire one, / That in the midst was placed paravaunt, / Was she to whom that shepheard pypt alone […]

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