Odd adjective – Being one of a pair or set without a corresponding mate. Spare is a synonym for odd in surplus topic. In some cases you can use "Spare" instead the word "Odd" as an adjective or a noun, when it comes to topics like single. Nearby Words: oddity, oddly
They rent out their spare bedroom (to a penguin, and even Wallace thinks that's a bit odd) at the same time Wallace buys automatic pants (that can walk around on their own, among other things) from NASA Surplus.