An extra item or part kept in reserve for replacement when needed.
ReserveBackupExtraReplacement
Current best complexity is 7:
Spare can be discovered in Concepts, categorized under Reserve, Backup, Extra, Replacement. An extra item or part kept in reserve for replacement when needed.
It has been discovered by 11 boards and crafted 16 times, first appearing 8 months ago. Spare can be created from 3 recipes, and goes on to appear as an ingredient in 90 others.
Spare was first discovered by Pete's board 8 months ago. The lowest-complexity recipe (7) is held by secret.
Related concepts worth exploring include Successor, Double Doomsday, Fail-safe, Replacement, Reserve, Substitute, and 6 more.