different between playboard vs plyboard

English

play +? board

playboard (plural playboards)

A ledge or shelf used in puppetry for balancing props.
- 2005, Carol R. Exner, Practical Puppetry A-Z: A Guide for Librarians and Teachers (page 106)
  Professional puppeteers hang their puppets upside down from a ring on the playboard shelf inside the puppet theater and slip the puppets on like gloves. […] When the puppet is removed, it is hung back in its place on the playboard.
The playfield of a pinball table or similar game.
- 1983, Heinz R. Pagels, The cosmic code: quantum physics as the language of nature
  Playing pinball requires total concentration, the right combination of skill and chance, a mastery of indeterminacy as the ball moves across the playboard and interacts with bumpers and cushions.

ply +? board

plyboard (countable and uncountable, plural plyboards)

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