The difference between singular and plural nouns is simple once you know what to look for
When a noun indicates one only, it is a singular noun
When a noun indicates more than one, it is plural
The difference between singular and plural nouns is that a singular noun refers to one thing, and a plural noun refers to multiple things
"Button" is singular
"Buttons" is plural
Most English nouns can be made plural by adding an "s" to the end.