Something left over: Remnant. (Merriam – Webster)
Something odd: Oddity. (Merriam – Webster)
An odd article, bit, remnant, or the like. (Dictionary.com)
An article belonging to a broken or incomplete set. (Dictionary.com)
An item or piece of something, typically one left over from a larger piece or set. (Oxford Dictionaries)
Oddments are unimportant objects of any kind, usually ones that are old or left over from a larger group of things. (Collins Dictionary)
Small pieces, usually of cloth, that have been cut from larger pieces. (Cambridge Dictionary)
Remnant vs Oddment – What’s the difference?