A countable noun:

For countable noun spelling rules, check plural noun

The girl likes to go shopping. (plural - girls like)

You should clean the glass. (plural - glasses)

A tornado was seen in Kansas today. (plural - Many tornados were)

I watched as the leaf fell. (plural - leaves)

She wants to eat that cherry. (plural - those cherries)

He dropped the book on his foot. (plural - feet)