Card game vocabulary
(Part of) the rules of Set read as follows:


  The dealer shuffles the cards and lays twelve cards (in a rectangle)
  face up on the table so that they can be seen by all players. The
  players remove a 'Set' of three cards as they are seen. Each 'Set' is
  checked by the other players. If correct, the 'Set' is kept by the
  player and the dealer replaces the three cards with three from the
  deck. Players do not take turns but pick up 'Sets' as soon as they see
  them. A player must call 'Set' before picking up the cards. After a
  player has called 'Set', no other player can pick up cards until the
  first player is finished. If a player calls 'Set' and does not have
  one, the player loses one point. The three cards are returned to the
  table.


As such, I'd recommend for your terms: (1) layout, or possibly deal; (2) replacement; (3) the cards [on the table]; (4) calling 'Set'; and (5) variation.  (Not in the above paragraph, but earlier in the rules I'm looking at, it states "Each card has a variation of the following four features".