Some nouns have different meanings in the singular and the plural. Examples are given below:
Air – atmosphere
Airs – affected manners
Blind – unable to see because of injury, disease, or a congenital condition.
Blinds – a screen for a window, especially one on a roller or made of slats.
Character– the mental and moral qualities distinctive to an individual.
Characters- People in a novel, play, or film
Custom – a traditional and widely accepted way of behaving or doing something that is specific to a particular society, place, or time.
Customs -the official department that administers and collects the duties levied by a government on imported goods.
Content – Someone who is in a state of peaceful happiness.
Contents – the things that are held or included in something.
Good -having the required qualities; of a high standard.
Goods – merchandise or possessions.
Force – strength or energy as an attribute of physical action or movement.
Forces – an organized military force equipped for fighting on land, sea or air.
Spectacle – a visually striking performance or display OR Some visual scene.
Spectacles – a pair of glasses.
Wood – the hard fibrous material that forms the main substance of the trunk or branches of a tree or shrub, used for fuel or timber
Woods -an area of land, smaller than a forest, that is covered with growing trees.
Manner – a way or method in which a thing is done or happens.
Manners – polite or well-bred social behavior OR etiquette one follows.