different between springal vs springall

English

springal (plural springals)

(archaic) Alternative form of springald (“a youth”)
Obsolete form of springald (“military engine for launching stones and arrows”).
- 1980, Chris Cook, John Stevenson, Weapons of War
  Various ‘artillery’ machines were employed. These were similar to machines known in antiquity to Rome and Byzantium. One such machine, particularly useful against wooden castles and on ships, was the springal.

springall (plural springalls)

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